./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/divbin_unwindbound20.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:41:18,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:41:18,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:41:18,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:41:18,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:41:18,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:41:18,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:41:18,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:41:18,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:41:18,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:41:18,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:41:18,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:41:18,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:41:18,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:41:18,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:41:18,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:41:18,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:41:18,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:41:18,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:41:18,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:41:18,215 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:41:18,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:41:18,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:41:18,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:41:18,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:41:18,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:41:18,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:41:18,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:41:18,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:41:18,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:41:18,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:41:18,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:41:18,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:41:18,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:41:18,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:41:18,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:41:18,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:41:18,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:41:18,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:41:18,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:41:18,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:41:18,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:41:18,228 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:41:18,242 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:41:18,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:41:18,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:41:18,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:41:18,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:41:18,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:41:18,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:41:18,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:41:18,244 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:41:18,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:41:18,245 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:41:18,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:41:18,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:41:18,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:41:18,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:41:18,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:41:18,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:41:18,246 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:41:18,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:41:18,246 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:41:18,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:41:18,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:41:18,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:41:18,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:41:18,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:41:18,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:41:18,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:41:18,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:41:18,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:41:18,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:41:18,248 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:41:18,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:41:18,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:41:18,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 [2022-07-19 15:41:18,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:41:18,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:41:18,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:41:18,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:41:18,413 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:41:18,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2022-07-19 15:41:18,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b8a0a26a/41c9ad54cfa84ac8a74c5d565d6da8b6/FLAG986a2c8f4 [2022-07-19 15:41:18,849 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:41:18,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2022-07-19 15:41:18,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b8a0a26a/41c9ad54cfa84ac8a74c5d565d6da8b6/FLAG986a2c8f4 [2022-07-19 15:41:18,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b8a0a26a/41c9ad54cfa84ac8a74c5d565d6da8b6 [2022-07-19 15:41:18,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:41:18,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:41:18,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:41:18,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:41:18,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:41:18,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:41:18" (1/1) ... [2022-07-19 15:41:18,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eacd867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:18, skipping insertion in model container [2022-07-19 15:41:18,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:41:18" (1/1) ... [2022-07-19 15:41:18,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:41:18,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:41:19,077 WARN L230 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/divbin_unwindbound20.i[950,963] [2022-07-19 15:41:19,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:41:19,104 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:41:19,115 WARN L230 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/divbin_unwindbound20.i[950,963] [2022-07-19 15:41:19,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:41:19,128 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:41:19,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19 WrapperNode [2022-07-19 15:41:19,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:41:19,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:41:19,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:41:19,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:41:19,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,148 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-07-19 15:41:19,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:41:19,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:41:19,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:41:19,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:41:19,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:41:19,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:41:19,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:41:19,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:41:19,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (1/1) ... [2022-07-19 15:41:19,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:41:19,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:19,183 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) [2022-07-19 15:41:19,185 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 [2022-07-19 15:41:19,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:41:19,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 15:41:19,211 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 15:41:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:41:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:41:19,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:41:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 15:41:19,212 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 15:41:19,250 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:41:19,254 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:41:19,354 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:41:19,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:41:19,358 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 15:41:19,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:41:19 BoogieIcfgContainer [2022-07-19 15:41:19,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:41:19,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:41:19,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:41:19,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:41:19,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:41:18" (1/3) ... [2022-07-19 15:41:19,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666f8c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:41:19, skipping insertion in model container [2022-07-19 15:41:19,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:41:19" (2/3) ... [2022-07-19 15:41:19,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666f8c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:41:19, skipping insertion in model container [2022-07-19 15:41:19,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:41:19" (3/3) ... [2022-07-19 15:41:19,365 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2022-07-19 15:41:19,374 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:41:19,374 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:41:19,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:41:19,409 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6a0ef452, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3fa0a016 [2022-07-19 15:41:19,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:41:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 15:41:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:41:19,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:19,417 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:19,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2022-07-19 15:41:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:19,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672913591] [2022-07-19 15:41:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 15:41:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:19,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:41:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:19,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:41:19,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672913591] [2022-07-19 15:41:19,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672913591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:41:19,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:41:19,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:41:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053825735] [2022-07-19 15:41:19,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:41:19,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:41:19,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:41:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:41:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:41:19,562 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:41:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:41:19,577 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-07-19 15:41:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:41:19,579 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-19 15:41:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:41:19,585 INFO L225 Difference]: With dead ends: 53 [2022-07-19 15:41:19,585 INFO L226 Difference]: Without dead ends: 24 [2022-07-19 15:41:19,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:41:19,591 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-07-19 15:41:19,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:41:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-19 15:41:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-19 15:41:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 15:41:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-19 15:41:19,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2022-07-19 15:41:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:41:19,620 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-19 15:41:19,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:41:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-07-19 15:41:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 15:41:19,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:19,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:19,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:41:19,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2022-07-19 15:41:19,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:19,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220551825] [2022-07-19 15:41:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:19,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:19,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:41:19,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377683262] [2022-07-19 15:41:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:19,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:19,655 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) [2022-07-19 15:41:19,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:41:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:19,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:41:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:41:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:19,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:41:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:41:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220551825] [2022-07-19 15:41:19,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:41:19,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377683262] [2022-07-19 15:41:19,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377683262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:41:19,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:41:19,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:41:19,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121018593] [2022-07-19 15:41:19,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:41:19,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:41:19,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:41:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:41:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:41:19,858 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:41:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:41:19,874 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-07-19 15:41:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:41:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-07-19 15:41:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:41:19,887 INFO L225 Difference]: With dead ends: 38 [2022-07-19 15:41:19,887 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 15:41:19,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:41:19,889 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 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 [2022-07-19 15:41:19,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:41:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 15:41:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-19 15:41:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 15:41:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-19 15:41:19,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2022-07-19 15:41:19,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:41:19,901 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-19 15:41:19,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:41:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-19 15:41:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 15:41:19,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:19,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:19,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 15:41:20,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:20,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2022-07-19 15:41:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:20,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782211148] [2022-07-19 15:41:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:20,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:41:20,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211608066] [2022-07-19 15:41:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:20,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:20,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:20,185 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) [2022-07-19 15:41:20,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:41:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:41:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:41:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:41:20,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:41:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:20,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:41:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782211148] [2022-07-19 15:41:20,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:41:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211608066] [2022-07-19 15:41:20,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211608066] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 15:41:20,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:41:20,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-07-19 15:41:20,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212545325] [2022-07-19 15:41:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:41:20,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:41:20,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:41:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:41:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:41:20,596 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:41:22,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:41:24,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-19 15:41:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:41:24,924 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-07-19 15:41:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:41:24,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-19 15:41:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:41:24,926 INFO L225 Difference]: With dead ends: 38 [2022-07-19 15:41:24,926 INFO L226 Difference]: Without dead ends: 35 [2022-07-19 15:41:24,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:41:24,927 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:41:24,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 87 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-19 15:41:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-19 15:41:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-19 15:41:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 15:41:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-07-19 15:41:24,934 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2022-07-19 15:41:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:41:24,935 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-07-19 15:41:24,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:41:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-07-19 15:41:24,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 15:41:24,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:24,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:24,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:41:25,150 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 [2022-07-19 15:41:25,151 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:25,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:25,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2022-07-19 15:41:25,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:25,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602198965] [2022-07-19 15:41:25,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:25,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:25,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:41:25,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029804893] [2022-07-19 15:41:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:25,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:25,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:25,164 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) [2022-07-19 15:41:25,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:41:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:41:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:41:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:25,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:41:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:25,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:41:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602198965] [2022-07-19 15:41:25,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:41:25,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029804893] [2022-07-19 15:41:25,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029804893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:41:25,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:41:25,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-19 15:41:25,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355348217] [2022-07-19 15:41:25,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:41:25,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 15:41:25,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:41:25,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 15:41:25,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:41:25,342 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:41:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:41:25,409 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2022-07-19 15:41:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 15:41:25,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2022-07-19 15:41:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:41:25,410 INFO L225 Difference]: With dead ends: 69 [2022-07-19 15:41:25,411 INFO L226 Difference]: Without dead ends: 57 [2022-07-19 15:41:25,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:41:25,412 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:41:25,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 145 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:41:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-19 15:41:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2022-07-19 15:41:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 15:41:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-07-19 15:41:25,417 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2022-07-19 15:41:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:41:25,417 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-07-19 15:41:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:41:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-07-19 15:41:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:41:25,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:25,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:25,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 15:41:25,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:25,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:25,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:25,634 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2022-07-19 15:41:25,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:25,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197213455] [2022-07-19 15:41:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:25,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:25,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:41:25,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131585207] [2022-07-19 15:41:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:25,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:25,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:25,657 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) [2022-07-19 15:41:25,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:41:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:41:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:41:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:41:25,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:41:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:26,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:41:26,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197213455] [2022-07-19 15:41:26,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:41:26,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131585207] [2022-07-19 15:41:26,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131585207] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 15:41:26,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:41:26,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-07-19 15:41:26,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314473353] [2022-07-19 15:41:26,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:41:26,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 15:41:26,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:41:26,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 15:41:26,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:41:26,004 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:41:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:41:26,024 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-19 15:41:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:41:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-19 15:41:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:41:26,026 INFO L225 Difference]: With dead ends: 53 [2022-07-19 15:41:26,026 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 15:41:26,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:41:26,027 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:41:26,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-07-19 15:41:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 15:41:26,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-07-19 15:41:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-19 15:41:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-19 15:41:26,038 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2022-07-19 15:41:26,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:41:26,038 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-19 15:41:26,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:41:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-19 15:41:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:41:26,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:26,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:26,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 15:41:26,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:26,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:26,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:26,257 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2022-07-19 15:41:26,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:26,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949420443] [2022-07-19 15:41:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:26,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:26,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:41:26,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792988747] [2022-07-19 15:41:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:26,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:26,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:26,304 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) [2022-07-19 15:41:26,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:41:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:26,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:41:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:41:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:26,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:41:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:26,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:41:26,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949420443] [2022-07-19 15:41:26,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:41:26,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792988747] [2022-07-19 15:41:26,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792988747] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:41:26,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:41:26,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-19 15:41:26,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463540628] [2022-07-19 15:41:26,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:41:26,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:41:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:41:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:41:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:41:26,443 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:41:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:41:26,579 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-07-19 15:41:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 15:41:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-19 15:41:26,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:41:26,580 INFO L225 Difference]: With dead ends: 124 [2022-07-19 15:41:26,580 INFO L226 Difference]: Without dead ends: 117 [2022-07-19 15:41:26,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:41:26,581 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:41:26,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 143 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:41:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-19 15:41:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2022-07-19 15:41:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 92 states have internal predecessors, (107), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-19 15:41:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2022-07-19 15:41:26,593 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 25 [2022-07-19 15:41:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:41:26,593 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2022-07-19 15:41:26,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 15:41:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2022-07-19 15:41:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:41:26,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:26,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:26,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 15:41:26,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:26,814 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2022-07-19 15:41:26,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:26,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311773231] [2022-07-19 15:41:26,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:26,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:26,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:41:26,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649207467] [2022-07-19 15:41:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:26,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:26,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:26,825 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) [2022-07-19 15:41:26,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:41:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:26,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:41:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:41:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:41:26,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:41:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:41:26,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311773231] [2022-07-19 15:41:26,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:41:26,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649207467] [2022-07-19 15:41:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649207467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:41:26,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:41:26,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:41:26,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029094535] [2022-07-19 15:41:26,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:41:26,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:41:26,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:41:26,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:41:26,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:41:26,878 INFO L87 Difference]: Start difference. First operand 110 states and 133 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:41:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:41:26,908 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2022-07-19 15:41:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:41:26,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-19 15:41:26,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:41:26,909 INFO L225 Difference]: With dead ends: 151 [2022-07-19 15:41:26,910 INFO L226 Difference]: Without dead ends: 96 [2022-07-19 15:41:26,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:41:26,911 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:41:26,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:41:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-19 15:41:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-19 15:41:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 80 states have internal predecessors, (94), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 15:41:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-07-19 15:41:26,920 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 31 [2022-07-19 15:41:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:41:26,920 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-07-19 15:41:26,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:41:26,920 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-07-19 15:41:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:41:26,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:26,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:26,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:41:27,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:27,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2022-07-19 15:41:27,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:27,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74473248] [2022-07-19 15:41:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:27,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:27,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:41:27,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332727759] [2022-07-19 15:41:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:27,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:27,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:27,168 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) [2022-07-19 15:41:27,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:41:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:41:27,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 15:41:27,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:41:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 15:41:27,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:41:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 15:41:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:41:27,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74473248] [2022-07-19 15:41:27,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:41:27,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332727759] [2022-07-19 15:41:27,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332727759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:41:27,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:41:27,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-19 15:41:27,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205485631] [2022-07-19 15:41:27,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:41:27,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:41:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:41:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:41:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:41:27,319 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 15:41:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:41:27,449 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-07-19 15:41:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 15:41:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-07-19 15:41:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:41:27,450 INFO L225 Difference]: With dead ends: 111 [2022-07-19 15:41:27,450 INFO L226 Difference]: Without dead ends: 91 [2022-07-19 15:41:27,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:41:27,451 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:41:27,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:41:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-19 15:41:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-19 15:41:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 76 states have internal predecessors, (88), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 15:41:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-07-19 15:41:27,459 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 31 [2022-07-19 15:41:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:41:27,459 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-07-19 15:41:27,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 15:41:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-07-19 15:41:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 15:41:27,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:41:27,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:41:27,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:41:27,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:27,679 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:41:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:41:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2022-07-19 15:41:27,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:41:27,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510207555] [2022-07-19 15:41:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:41:27,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:41:27,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670270973] [2022-07-19 15:41:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:41:27,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:41:27,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:41:27,690 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) [2022-07-19 15:41:27,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process