./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 f4b24e32 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-?-f4b24e3 [2022-07-13 16:15:13,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:15:13,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:15:13,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:15:13,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:15:13,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:15:13,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:15:13,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:15:13,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:15:13,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:15:13,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:15:13,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:15:13,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:15:13,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:15:13,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:15:13,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:15:13,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:15:13,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:15:13,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:15:13,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:15:13,218 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:15:13,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:15:13,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:15:13,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:15:13,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:15:13,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:15:13,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:15:13,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:15:13,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:15:13,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:15:13,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:15:13,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:15:13,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:15:13,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:15:13,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:15:13,227 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:15:13,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:15:13,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:15:13,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:15:13,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:15:13,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:15:13,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:15:13,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:15:13,245 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:15:13,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:15:13,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:15:13,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:15:13,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:15:13,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:15:13,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:15:13,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:15:13,247 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:15:13,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:15:13,247 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:15:13,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:15:13,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:15:13,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:15:13,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:15:13,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:15:13,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:15:13,248 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:15:13,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:15:13,248 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:15:13,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:15:13,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:15:13,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:15:13,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:15:13,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:15:13,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:15:13,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:15:13,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:15:13,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:15:13,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:15:13,252 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:15:13,252 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:15:13,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:15:13,252 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e073a4c36b82f2b6062e496bb836cd3d16667ec7228f4ab2b6689e74fa81265 [2022-07-13 16:15:13,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:15:13,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:15:13,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:15:13,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:15:13,428 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:15:13,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2022-07-13 16:15:13,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b0b509df/2fc718ba53f74d5ca11c89861d113c3e/FLAGb50407a89 [2022-07-13 16:15:13,813 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:15:13,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound20.i [2022-07-13 16:15:13,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b0b509df/2fc718ba53f74d5ca11c89861d113c3e/FLAGb50407a89 [2022-07-13 16:15:14,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b0b509df/2fc718ba53f74d5ca11c89861d113c3e [2022-07-13 16:15:14,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:15:14,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:15:14,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:15:14,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:15:14,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:15:14,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3195de1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14, skipping insertion in model container [2022-07-13 16:15:14,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:15:14,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:15:14,400 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] [2022-07-13 16:15:14,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:15:14,416 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:15:14,424 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] [2022-07-13 16:15:14,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:15:14,437 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:15:14,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14 WrapperNode [2022-07-13 16:15:14,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:15:14,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:15:14,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:15:14,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:15:14,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,459 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-07-13 16:15:14,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:15:14,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:15:14,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:15:14,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:15:14,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:15:14,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:15:14,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:15:14,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:15:14,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (1/1) ... [2022-07-13 16:15:14,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:15:14,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:14,507 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) [2022-07-13 16:15:14,515 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 [2022-07-13 16:15:14,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:15:14,535 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 16:15:14,535 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 16:15:14,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:15:14,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:15:14,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:15:14,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:15:14,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:15:14,575 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:15:14,576 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:15:14,661 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:15:14,665 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:15:14,666 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 16:15:14,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:15:14 BoogieIcfgContainer [2022-07-13 16:15:14,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:15:14,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:15:14,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:15:14,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:15:14,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:15:14" (1/3) ... [2022-07-13 16:15:14,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c41e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:15:14, skipping insertion in model container [2022-07-13 16:15:14,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:14" (2/3) ... [2022-07-13 16:15:14,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c41e30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:15:14, skipping insertion in model container [2022-07-13 16:15:14,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:15:14" (3/3) ... [2022-07-13 16:15:14,677 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound20.i [2022-07-13 16:15:14,687 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:15:14,687 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:15:14,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:15:14,746 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@d54b7be, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59dea1bf [2022-07-13 16:15:14,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:15:14,757 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) [2022-07-13 16:15:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 16:15:14,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:14,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:14,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2022-07-13 16:15:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:14,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508789455] [2022-07-13 16:15:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:14,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 16:15:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:14,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 16:15:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:14,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508789455] [2022-07-13 16:15:14,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508789455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:15:14,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:15:14,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:15:14,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989291985] [2022-07-13 16:15:14,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:14,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:15:14,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:15:14,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:15:14,959 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) [2022-07-13 16:15:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:14,977 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-07-13 16:15:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:15:14,979 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 [2022-07-13 16:15:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:14,985 INFO L225 Difference]: With dead ends: 53 [2022-07-13 16:15:14,986 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 16:15:14,988 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 [2022-07-13 16:15:15,000 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 [2022-07-13 16:15:15,001 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] [2022-07-13 16:15:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 16:15:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-13 16:15:15,032 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) [2022-07-13 16:15:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-13 16:15:15,035 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2022-07-13 16:15:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:15,035 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-13 16:15:15,036 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) [2022-07-13 16:15:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-07-13 16:15:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 16:15:15,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:15,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:15,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:15:15,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2022-07-13 16:15:15,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:15,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806903771] [2022-07-13 16:15:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:15,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:15,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:15,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100807204] [2022-07-13 16:15:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:15,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:15,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:15,080 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) [2022-07-13 16:15:15,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:15:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 16:15:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:15,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:15:15,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:15,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806903771] [2022-07-13 16:15:15,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:15,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100807204] [2022-07-13 16:15:15,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100807204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:15:15,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:15:15,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:15:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065791509] [2022-07-13 16:15:15,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:15,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:15:15,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:15:15,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:15:15,227 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) [2022-07-13 16:15:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:15,252 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-07-13 16:15:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:15:15,253 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 [2022-07-13 16:15:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:15,254 INFO L225 Difference]: With dead ends: 38 [2022-07-13 16:15:15,254 INFO L226 Difference]: Without dead ends: 26 [2022-07-13 16:15:15,254 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 [2022-07-13 16:15:15,255 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 [2022-07-13 16:15:15,257 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] [2022-07-13 16:15:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-13 16:15:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-13 16:15:15,260 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) [2022-07-13 16:15:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-13 16:15:15,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2022-07-13 16:15:15,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:15,262 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-13 16:15:15,263 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) [2022-07-13 16:15:15,263 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-13 16:15:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 16:15:15,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:15,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:15,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:15,483 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 [2022-07-13 16:15:15,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:15,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2022-07-13 16:15:15,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:15,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105687932] [2022-07-13 16:15:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:15,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:15,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:15,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085422823] [2022-07-13 16:15:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:15,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:15,497 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) [2022-07-13 16:15:15,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:15:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 16:15:15,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 16:15:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:15,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:15,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105687932] [2022-07-13 16:15:15,867 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:15,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085422823] [2022-07-13 16:15:15,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085422823] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:15:15,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:15:15,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-07-13 16:15:15,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672375592] [2022-07-13 16:15:15,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:15,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:15:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:15,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:15:15,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:15:15,869 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) [2022-07-13 16:15:18,020 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 [] [2022-07-13 16:15:20,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:15:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:20,208 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-07-13 16:15:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:15:20,209 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 [2022-07-13 16:15:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:20,209 INFO L225 Difference]: With dead ends: 38 [2022-07-13 16:15:20,209 INFO L226 Difference]: Without dead ends: 35 [2022-07-13 16:15:20,210 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 [2022-07-13 16:15:20,211 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 [2022-07-13 16:15:20,211 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] [2022-07-13 16:15:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-13 16:15:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-13 16:15:20,216 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) [2022-07-13 16:15:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-07-13 16:15:20,216 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2022-07-13 16:15:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:20,217 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-07-13 16:15:20,217 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) [2022-07-13 16:15:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-07-13 16:15:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 16:15:20,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:20,218 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] [2022-07-13 16:15:20,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:20,431 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 [2022-07-13 16:15:20,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2022-07-13 16:15:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:20,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465881925] [2022-07-13 16:15:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:20,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:20,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26228379] [2022-07-13 16:15:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:20,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:20,454 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) [2022-07-13 16:15:20,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 16:15:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:15:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:20,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:20,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:20,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465881925] [2022-07-13 16:15:20,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:20,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26228379] [2022-07-13 16:15:20,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26228379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:15:20,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:15:20,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-13 16:15:20,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557828490] [2022-07-13 16:15:20,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:15:20,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 16:15:20,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 16:15:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:15:20,607 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) [2022-07-13 16:15:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:20,671 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2022-07-13 16:15:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:15:20,671 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 [2022-07-13 16:15:20,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:20,672 INFO L225 Difference]: With dead ends: 69 [2022-07-13 16:15:20,672 INFO L226 Difference]: Without dead ends: 57 [2022-07-13 16:15:20,673 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 [2022-07-13 16:15:20,674 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 [2022-07-13 16:15:20,674 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] [2022-07-13 16:15:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-13 16:15:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2022-07-13 16:15:20,678 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) [2022-07-13 16:15:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-07-13 16:15:20,679 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2022-07-13 16:15:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:20,680 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-07-13 16:15:20,680 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) [2022-07-13 16:15:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-07-13 16:15:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 16:15:20,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:20,681 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] [2022-07-13 16:15:20,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:20,902 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 [2022-07-13 16:15:20,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2022-07-13 16:15:20,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205359130] [2022-07-13 16:15:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:20,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:20,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:20,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560208583] [2022-07-13 16:15:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:20,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:20,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:20,938 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) [2022-07-13 16:15:20,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 16:15:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:20,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 16:15:20,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 16:15:21,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:21,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:21,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205359130] [2022-07-13 16:15:21,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:21,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560208583] [2022-07-13 16:15:21,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560208583] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:15:21,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:15:21,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-07-13 16:15:21,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875421057] [2022-07-13 16:15:21,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:15:21,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:21,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:15:21,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:15:21,396 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) [2022-07-13 16:15:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:21,422 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-13 16:15:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:15:21,422 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 [2022-07-13 16:15:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:21,424 INFO L225 Difference]: With dead ends: 53 [2022-07-13 16:15:21,424 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 16:15:21,425 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 [2022-07-13 16:15:21,425 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 [2022-07-13 16:15:21,426 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] [2022-07-13 16:15:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 16:15:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-07-13 16:15:21,437 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) [2022-07-13 16:15:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-13 16:15:21,438 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2022-07-13 16:15:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:21,438 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-13 16:15:21,438 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) [2022-07-13 16:15:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-13 16:15:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 16:15:21,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:21,439 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] [2022-07-13 16:15:21,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:21,646 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 [2022-07-13 16:15:21,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:21,647 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2022-07-13 16:15:21,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:21,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266526642] [2022-07-13 16:15:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:21,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:21,657 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:21,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080288511] [2022-07-13 16:15:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:21,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:21,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:21,659 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) [2022-07-13 16:15:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:21,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 16:15:21,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:15:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:21,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:21,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:21,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266526642] [2022-07-13 16:15:21,811 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080288511] [2022-07-13 16:15:21,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080288511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:15:21,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:15:21,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-07-13 16:15:21,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438277953] [2022-07-13 16:15:21,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:15:21,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 16:15:21,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 16:15:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 16:15:21,814 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) [2022-07-13 16:15:21,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:21,912 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2022-07-13 16:15:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 16:15:21,913 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 [2022-07-13 16:15:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:21,914 INFO L225 Difference]: With dead ends: 124 [2022-07-13 16:15:21,914 INFO L226 Difference]: Without dead ends: 117 [2022-07-13 16:15:21,915 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 [2022-07-13 16:15:21,915 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 [2022-07-13 16:15:21,916 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] [2022-07-13 16:15:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-13 16:15:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2022-07-13 16:15:21,925 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) [2022-07-13 16:15:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 133 transitions. [2022-07-13 16:15:21,926 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 133 transitions. Word has length 25 [2022-07-13 16:15:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:21,927 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 133 transitions. [2022-07-13 16:15:21,927 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) [2022-07-13 16:15:21,927 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 133 transitions. [2022-07-13 16:15:21,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 16:15:21,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:21,928 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] [2022-07-13 16:15:21,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:22,143 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 [2022-07-13 16:15:22,144 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:22,145 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2022-07-13 16:15:22,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:22,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866003274] [2022-07-13 16:15:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:22,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:22,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:22,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801757869] [2022-07-13 16:15:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:22,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:22,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:22,161 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) [2022-07-13 16:15:22,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 16:15:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 16:15:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:22,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:15:22,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866003274] [2022-07-13 16:15:22,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:22,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801757869] [2022-07-13 16:15:22,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801757869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:15:22,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:15:22,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:15:22,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761495823] [2022-07-13 16:15:22,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:22,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 16:15:22,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 16:15:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 16:15:22,212 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) [2022-07-13 16:15:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:22,231 INFO L93 Difference]: Finished difference Result 151 states and 185 transitions. [2022-07-13 16:15:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 16:15:22,231 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 [2022-07-13 16:15:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:22,232 INFO L225 Difference]: With dead ends: 151 [2022-07-13 16:15:22,232 INFO L226 Difference]: Without dead ends: 96 [2022-07-13 16:15:22,233 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 [2022-07-13 16:15:22,233 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 [2022-07-13 16:15:22,234 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] [2022-07-13 16:15:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-13 16:15:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-13 16:15:22,241 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) [2022-07-13 16:15:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-07-13 16:15:22,242 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 31 [2022-07-13 16:15:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:22,242 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-07-13 16:15:22,242 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) [2022-07-13 16:15:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-07-13 16:15:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 16:15:22,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:22,243 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] [2022-07-13 16:15:22,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:22,460 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 [2022-07-13 16:15:22,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:22,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2022-07-13 16:15:22,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:22,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518015160] [2022-07-13 16:15:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:22,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:22,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:22,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295658575] [2022-07-13 16:15:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:22,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:22,471 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) [2022-07-13 16:15:22,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 16:15:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 16:15:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 16:15:22,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 16:15:22,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518015160] [2022-07-13 16:15:22,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295658575] [2022-07-13 16:15:22,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295658575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:15:22,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:15:22,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-13 16:15:22,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409810945] [2022-07-13 16:15:22,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:15:22,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:15:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:15:22,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:15:22,597 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) [2022-07-13 16:15:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:22,676 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-07-13 16:15:22,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 16:15:22,676 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 [2022-07-13 16:15:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:22,677 INFO L225 Difference]: With dead ends: 111 [2022-07-13 16:15:22,677 INFO L226 Difference]: Without dead ends: 91 [2022-07-13 16:15:22,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:15:22,678 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-07-13 16:15:22,678 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] [2022-07-13 16:15:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-13 16:15:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-07-13 16:15:22,684 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) [2022-07-13 16:15:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-07-13 16:15:22,685 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 31 [2022-07-13 16:15:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:22,686 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-07-13 16:15:22,686 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) [2022-07-13 16:15:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-07-13 16:15:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 16:15:22,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:22,687 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] [2022-07-13 16:15:22,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:22,902 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 [2022-07-13 16:15:22,902 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2022-07-13 16:15:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:22,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847437700] [2022-07-13 16:15:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:22,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:22,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:22,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398158197] [2022-07-13 16:15:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:22,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:22,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:22,913 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) [2022-07-13 16:15:22,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process