./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/ps4-ll_valuebound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 53086523abe0dc699ccd28b0916f17f8825d4641577f06835b9d81e9579a444f --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:20:45,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:20:45,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:20:45,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:20:45,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:20:45,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:20:45,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:20:45,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:20:45,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:20:45,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:20:45,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:20:45,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:20:45,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:20:45,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:20:45,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:20:45,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:20:45,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:20:45,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:20:45,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:20:45,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:20:45,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:20:45,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:20:45,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:20:45,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:20:45,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:20:45,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:20:45,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:20:45,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:20:45,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:20:45,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:20:45,457 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:20:45,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:20:45,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:20:45,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:20:45,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:20:45,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:20:45,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:20:45,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:20:45,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:20:45,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:20:45,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:20:45,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:20:45,483 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:20:45,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:20:45,487 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:20:45,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:20:45,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:20:45,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:20:45,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:20:45,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:20:45,488 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:20:45,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:20:45,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:20:45,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:20:45,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:20:45,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:20:45,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:20:45,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:20:45,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:20:45,490 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:20:45,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:20:45,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:20:45,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:20:45,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:20:45,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:20:45,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:20:45,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:20:45,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:20:45,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:20:45,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:20:45,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:20:45,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:20:45,493 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:20:45,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:20:45,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:20:45,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:20:45,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53086523abe0dc699ccd28b0916f17f8825d4641577f06835b9d81e9579a444f [2021-12-14 14:20:45,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:20:45,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:20:45,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:20:45,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:20:45,689 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:20:45,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2021-12-14 14:20:45,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8640b48d9/b5541cc9377f4614af865c988dc3bd3d/FLAGec369ac5c [2021-12-14 14:20:46,123 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:20:46,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2021-12-14 14:20:46,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8640b48d9/b5541cc9377f4614af865c988dc3bd3d/FLAGec369ac5c [2021-12-14 14:20:46,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8640b48d9/b5541cc9377f4614af865c988dc3bd3d [2021-12-14 14:20:46,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:20:46,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:20:46,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:20:46,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:20:46,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:20:46,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdb4219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46, skipping insertion in model container [2021-12-14 14:20:46,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:20:46,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:20:46,287 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/ps4-ll_valuebound10.c[458,471] [2021-12-14 14:20:46,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:20:46,305 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:20:46,313 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/ps4-ll_valuebound10.c[458,471] [2021-12-14 14:20:46,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:20:46,333 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:20:46,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46 WrapperNode [2021-12-14 14:20:46,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:20:46,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:20:46,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:20:46,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:20:46,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,355 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-12-14 14:20:46,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:20:46,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:20:46,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:20:46,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:20:46,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:20:46,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:20:46,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:20:46,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:20:46,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (1/1) ... [2021-12-14 14:20:46,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:20:46,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:46,416 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) [2021-12-14 14:20:46,428 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 [2021-12-14 14:20:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:20:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:20:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:20:46,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:20:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 14:20:46,456 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 14:20:46,493 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:20:46,494 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:20:46,600 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:20:46,607 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:20:46,608 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 14:20:46,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:20:46 BoogieIcfgContainer [2021-12-14 14:20:46,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:20:46,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:20:46,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:20:46,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:20:46,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:20:46" (1/3) ... [2021-12-14 14:20:46,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5031f3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:20:46, skipping insertion in model container [2021-12-14 14:20:46,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:20:46" (2/3) ... [2021-12-14 14:20:46,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5031f3ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:20:46, skipping insertion in model container [2021-12-14 14:20:46,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:20:46" (3/3) ... [2021-12-14 14:20:46,616 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.c [2021-12-14 14:20:46,620 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:20:46,620 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:20:46,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:20:46,666 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 14:20:46,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:20:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:20:46,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 14:20:46,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:46,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:46,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:46,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2021-12-14 14:20:46,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:46,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650602070] [2021-12-14 14:20:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:46,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:20:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:20:46,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:46,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650602070] [2021-12-14 14:20:46,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650602070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:20:46,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:20:46,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 14:20:46,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307245974] [2021-12-14 14:20:46,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:20:46,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 14:20:46,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:46,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 14:20:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 14:20:46,869 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:20:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:46,879 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-12-14 14:20:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 14:20:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-14 14:20:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:46,885 INFO L225 Difference]: With dead ends: 35 [2021-12-14 14:20:46,899 INFO L226 Difference]: Without dead ends: 15 [2021-12-14 14:20:46,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 14:20:46,903 INFO L933 BasicCegarLoop]: 21 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, 21 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 [2021-12-14 14:20:46,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:20:46,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-14 14:20:46,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-14 14:20:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:20:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-14 14:20:46,931 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-12-14 14:20:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:46,931 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-14 14:20:46,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:20:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-14 14:20:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 14:20:46,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:46,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:46,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:20:46,933 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2021-12-14 14:20:46,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344953720] [2021-12-14 14:20:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:46,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:46,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498038303] [2021-12-14 14:20:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:46,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:46,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:46,972 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) [2021-12-14 14:20:47,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 14:20:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:20:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 14:20:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:20:47,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:20:47,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344953720] [2021-12-14 14:20:47,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:47,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498038303] [2021-12-14 14:20:47,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498038303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:20:47,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:20:47,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 14:20:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623357786] [2021-12-14 14:20:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:20:47,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:20:47,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:20:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 14:20:47,085 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:20:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:47,115 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-12-14 14:20:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:20:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-14 14:20:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:47,116 INFO L225 Difference]: With dead ends: 26 [2021-12-14 14:20:47,116 INFO L226 Difference]: Without dead ends: 22 [2021-12-14 14:20:47,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:20:47,117 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:47,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:20:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-14 14:20:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-14 14:20:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-12-14 14:20:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-14 14:20:47,122 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2021-12-14 14:20:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:47,123 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-14 14:20:47,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:20:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-14 14:20:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 14:20:47,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:47,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:47,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:47,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:47,340 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2021-12-14 14:20:47,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:47,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413244567] [2021-12-14 14:20:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:47,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:47,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:47,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780618470] [2021-12-14 14:20:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:47,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:47,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:47,369 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) [2021-12-14 14:20:47,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 14:20:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:20:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 14:20:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:20:47,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 14:20:47,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:47,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413244567] [2021-12-14 14:20:47,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:47,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780618470] [2021-12-14 14:20:47,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780618470] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:47,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:47,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-14 14:20:47,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825251418] [2021-12-14 14:20:47,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:20:47,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 14:20:47,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:47,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 14:20:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:20:47,682 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 14:20:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:47,711 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-12-14 14:20:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 14:20:47,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-14 14:20:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:47,712 INFO L225 Difference]: With dead ends: 28 [2021-12-14 14:20:47,712 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 14:20:47,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 14:20:47,713 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:47,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 44 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:20:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 14:20:47,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-14 14:20:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:20:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-12-14 14:20:47,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2021-12-14 14:20:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:47,717 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-12-14 14:20:47,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 14:20:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-12-14 14:20:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 14:20:47,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:47,718 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:47,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:47,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-14 14:20:47,935 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2021-12-14 14:20:47,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:47,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042424957] [2021-12-14 14:20:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:47,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:47,942 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:47,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33687099] [2021-12-14 14:20:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:47,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:47,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:47,945 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) [2021-12-14 14:20:47,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 14:20:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:20:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 14:20:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 14:20:48,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:48,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:48,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042424957] [2021-12-14 14:20:48,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:48,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33687099] [2021-12-14 14:20:48,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33687099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:48,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:48,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-14 14:20:48,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925877523] [2021-12-14 14:20:48,237 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:48,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:20:48,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:20:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-14 14:20:48,238 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:20:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:48,279 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-12-14 14:20:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 14:20:48,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-14 14:20:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:48,280 INFO L225 Difference]: With dead ends: 31 [2021-12-14 14:20:48,280 INFO L226 Difference]: Without dead ends: 26 [2021-12-14 14:20:48,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:20:48,281 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:48,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:20:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-14 14:20:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-14 14:20:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:20:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-12-14 14:20:48,285 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2021-12-14 14:20:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:48,286 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-12-14 14:20:48,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 14:20:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-12-14 14:20:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 14:20:48,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:48,287 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:48,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:48,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:48,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2021-12-14 14:20:48,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:48,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253098210] [2021-12-14 14:20:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:48,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:48,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:48,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966727890] [2021-12-14 14:20:48,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 14:20:48,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:48,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:48,514 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) [2021-12-14 14:20:48,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 14:20:48,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 14:20:48,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 14:20:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 14:20:48,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:48,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:48,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253098210] [2021-12-14 14:20:48,923 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:48,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966727890] [2021-12-14 14:20:48,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966727890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:48,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:48,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-14 14:20:48,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762827906] [2021-12-14 14:20:48,924 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:48,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 14:20:48,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 14:20:48,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:20:48,925 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:20:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:48,975 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-12-14 14:20:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 14:20:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-12-14 14:20:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:48,976 INFO L225 Difference]: With dead ends: 34 [2021-12-14 14:20:48,976 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 14:20:48,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:20:48,977 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:48,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 109 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:20:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 14:20:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-14 14:20:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 14:20:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-14 14:20:48,981 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-12-14 14:20:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:48,981 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-14 14:20:48,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 14:20:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-14 14:20:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 14:20:48,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:48,982 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:49,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 14:20:49,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:49,194 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2021-12-14 14:20:49,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:49,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901895474] [2021-12-14 14:20:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:49,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:49,200 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:49,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229742124] [2021-12-14 14:20:49,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 14:20:49,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:49,202 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) [2021-12-14 14:20:49,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 14:20:49,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 14:20:49,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 14:20:49,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 14:20:49,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:49,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:49,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901895474] [2021-12-14 14:20:49,528 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:49,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229742124] [2021-12-14 14:20:49,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229742124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:49,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:49,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-14 14:20:49,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981564308] [2021-12-14 14:20:49,528 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:49,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 14:20:49,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 14:20:49,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-14 14:20:49,529 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 14:20:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:49,590 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-14 14:20:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 14:20:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-12-14 14:20:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:49,591 INFO L225 Difference]: With dead ends: 37 [2021-12-14 14:20:49,591 INFO L226 Difference]: Without dead ends: 32 [2021-12-14 14:20:49,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-14 14:20:49,592 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:49,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 14:20:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-14 14:20:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-14 14:20:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 14:20:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-14 14:20:49,596 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2021-12-14 14:20:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:49,596 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-14 14:20:49,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 14:20:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-14 14:20:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 14:20:49,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:49,597 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:49,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:49,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:49,814 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1384689793, now seen corresponding path program 4 times [2021-12-14 14:20:49,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:49,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186292341] [2021-12-14 14:20:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:49,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:49,820 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:49,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111689896] [2021-12-14 14:20:49,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 14:20:49,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:49,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:49,822 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) [2021-12-14 14:20:49,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 14:20:49,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 14:20:49,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:49,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 14:20:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 14:20:50,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:50,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:50,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186292341] [2021-12-14 14:20:50,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:50,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111689896] [2021-12-14 14:20:50,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111689896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:50,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:50,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-14 14:20:50,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947104739] [2021-12-14 14:20:50,201 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:50,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 14:20:50,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 14:20:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-14 14:20:50,202 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 14:20:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:50,298 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-12-14 14:20:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:20:50,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2021-12-14 14:20:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:50,299 INFO L225 Difference]: With dead ends: 40 [2021-12-14 14:20:50,299 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 14:20:50,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-14 14:20:50,299 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:50,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 177 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:20:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 14:20:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-14 14:20:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 14:20:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-14 14:20:50,304 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2021-12-14 14:20:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:50,304 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-14 14:20:50,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-14 14:20:50,304 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-14 14:20:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-14 14:20:50,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:50,305 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:50,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 14:20:50,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:50,506 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash -23130184, now seen corresponding path program 5 times [2021-12-14 14:20:50,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:50,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222814750] [2021-12-14 14:20:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:50,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:50,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:50,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234527615] [2021-12-14 14:20:50,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 14:20:50,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:50,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:50,518 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) [2021-12-14 14:20:50,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 14:20:50,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-14 14:20:50,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 14:20:50,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 14:20:50,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:51,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:51,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222814750] [2021-12-14 14:20:51,256 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:51,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234527615] [2021-12-14 14:20:51,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234527615] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:51,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:51,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-14 14:20:51,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344287829] [2021-12-14 14:20:51,256 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:51,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 14:20:51,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 14:20:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-12-14 14:20:51,257 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 14:20:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:51,374 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-14 14:20:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 14:20:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-12-14 14:20:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:51,375 INFO L225 Difference]: With dead ends: 43 [2021-12-14 14:20:51,375 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 14:20:51,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-12-14 14:20:51,375 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:51,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 217 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:20:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 14:20:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-14 14:20:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-14 14:20:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-12-14 14:20:51,380 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2021-12-14 14:20:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:51,380 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-12-14 14:20:51,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-14 14:20:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-12-14 14:20:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-14 14:20:51,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:51,381 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:51,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:51,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:51,592 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1898941279, now seen corresponding path program 6 times [2021-12-14 14:20:51,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:51,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036398828] [2021-12-14 14:20:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:51,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:51,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:51,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271020367] [2021-12-14 14:20:51,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 14:20:51,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:51,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:51,599 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) [2021-12-14 14:20:51,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 14:20:51,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-14 14:20:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-14 14:20:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 14:20:51,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:52,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:52,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036398828] [2021-12-14 14:20:52,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:52,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271020367] [2021-12-14 14:20:52,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271020367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:52,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:52,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-14 14:20:52,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251924302] [2021-12-14 14:20:52,381 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:52,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 14:20:52,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 14:20:52,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-12-14 14:20:52,382 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-14 14:20:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:52,509 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-12-14 14:20:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 14:20:52,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 57 [2021-12-14 14:20:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:52,510 INFO L225 Difference]: With dead ends: 46 [2021-12-14 14:20:52,510 INFO L226 Difference]: Without dead ends: 41 [2021-12-14 14:20:52,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-12-14 14:20:52,511 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:52,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 261 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:20:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-14 14:20:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-14 14:20:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 14:20:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-14 14:20:52,515 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2021-12-14 14:20:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:52,516 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-14 14:20:52,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-14 14:20:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-14 14:20:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 14:20:52,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:52,517 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:52,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:52,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-14 14:20:52,728 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 7 times [2021-12-14 14:20:52,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:52,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015703980] [2021-12-14 14:20:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:52,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:52,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825598192] [2021-12-14 14:20:52,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 14:20:52,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:52,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:20:52,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 14:20:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:20:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-14 14:20:52,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-14 14:20:53,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:53,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015703980] [2021-12-14 14:20:53,289 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825598192] [2021-12-14 14:20:53,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825598192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:53,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:53,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-14 14:20:53,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436823041] [2021-12-14 14:20:53,290 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:53,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 14:20:53,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 14:20:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:20:53,291 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 14:20:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:53,422 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-12-14 14:20:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 14:20:53,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2021-12-14 14:20:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:53,423 INFO L225 Difference]: With dead ends: 49 [2021-12-14 14:20:53,423 INFO L226 Difference]: Without dead ends: 44 [2021-12-14 14:20:53,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-14 14:20:53,423 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:53,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 309 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:20:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-14 14:20:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-14 14:20:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 14:20:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-14 14:20:53,427 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2021-12-14 14:20:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:53,428 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-14 14:20:53,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 14:20:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-14 14:20:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 14:20:53,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:53,429 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:53,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:53,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 14:20:53,633 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:53,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 8 times [2021-12-14 14:20:53,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:53,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760103531] [2021-12-14 14:20:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:53,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:53,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:53,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41076325] [2021-12-14 14:20:53,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 14:20:53,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:53,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:20:53,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 14:20:53,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 14:20:53,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:53,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-14 14:20:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-14 14:20:54,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:54,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760103531] [2021-12-14 14:20:54,362 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41076325] [2021-12-14 14:20:54,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41076325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:54,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:54,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-14 14:20:54,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196802706] [2021-12-14 14:20:54,363 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:54,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-14 14:20:54,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-14 14:20:54,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:20:54,364 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 14:20:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:54,522 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-12-14 14:20:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:20:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2021-12-14 14:20:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:54,523 INFO L225 Difference]: With dead ends: 52 [2021-12-14 14:20:54,523 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 14:20:54,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-14 14:20:54,524 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:54,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 361 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:20:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 14:20:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-14 14:20:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-14 14:20:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-14 14:20:54,528 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2021-12-14 14:20:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:54,528 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-14 14:20:54,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 14:20:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-14 14:20:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 14:20:54,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:54,529 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:54,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:54,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 14:20:54,734 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:54,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 9 times [2021-12-14 14:20:54,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:54,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313903368] [2021-12-14 14:20:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:54,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:54,739 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:54,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861704323] [2021-12-14 14:20:54,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 14:20:54,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:54,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:54,742 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:20:54,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 14:20:55,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-14 14:20:55,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:55,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-14 14:20:55,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-14 14:20:55,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:55,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313903368] [2021-12-14 14:20:55,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:55,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861704323] [2021-12-14 14:20:55,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861704323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:55,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:55,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-14 14:20:55,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654333958] [2021-12-14 14:20:55,630 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:55,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 14:20:55,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 14:20:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-12-14 14:20:55,632 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-14 14:20:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:55,804 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-12-14 14:20:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:20:55,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 78 [2021-12-14 14:20:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:55,806 INFO L225 Difference]: With dead ends: 55 [2021-12-14 14:20:55,806 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 14:20:55,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-14 14:20:55,807 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:55,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 417 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:20:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 14:20:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-14 14:20:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-14 14:20:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-12-14 14:20:55,814 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2021-12-14 14:20:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:55,815 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-12-14 14:20:55,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-14 14:20:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-12-14 14:20:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-14 14:20:55,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:55,816 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:55,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:56,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 14:20:56,018 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 10 times [2021-12-14 14:20:56,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:56,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673018375] [2021-12-14 14:20:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:56,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:56,024 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:56,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150342056] [2021-12-14 14:20:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 14:20:56,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:56,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:56,050 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:20:56,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 14:20:56,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 14:20:56,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 14:20:56,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-14 14:20:56,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 14:20:56,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:56,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673018375] [2021-12-14 14:20:56,846 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:56,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150342056] [2021-12-14 14:20:56,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150342056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 14:20:56,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 14:20:56,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-14 14:20:56,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465825894] [2021-12-14 14:20:56,847 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 14:20:56,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-14 14:20:56,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:56,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-14 14:20:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-14 14:20:56,848 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-14 14:20:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:57,043 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-12-14 14:20:57,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 14:20:57,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 85 [2021-12-14 14:20:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:57,044 INFO L225 Difference]: With dead ends: 58 [2021-12-14 14:20:57,045 INFO L226 Difference]: Without dead ends: 53 [2021-12-14 14:20:57,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-14 14:20:57,045 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:57,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 477 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 14:20:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-14 14:20:57,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-14 14:20:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-14 14:20:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-12-14 14:20:57,050 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2021-12-14 14:20:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:57,050 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-12-14 14:20:57,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-14 14:20:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-12-14 14:20:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-14 14:20:57,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:20:57,051 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 14:20:57,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-14 14:20:57,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-14 14:20:57,255 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:20:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:20:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 11 times [2021-12-14 14:20:57,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:20:57,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955758242] [2021-12-14 14:20:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:20:57,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:20:57,261 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-14 14:20:57,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841062848] [2021-12-14 14:20:57,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 14:20:57,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 14:20:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:20:57,275 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 14:20:57,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 14:20:57,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-14 14:20:57,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 14:20:57,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 14:20:57,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 14:20:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-12-14 14:20:58,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 14:20:58,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:20:58,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955758242] [2021-12-14 14:20:58,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-14 14:20:58,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841062848] [2021-12-14 14:20:58,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841062848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:20:58,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:20:58,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-14 14:20:58,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182857501] [2021-12-14 14:20:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:20:58,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 14:20:58,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:20:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 14:20:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-12-14 14:20:58,369 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-14 14:20:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:20:58,643 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-12-14 14:20:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:20:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 92 [2021-12-14 14:20:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:20:58,644 INFO L225 Difference]: With dead ends: 57 [2021-12-14 14:20:58,644 INFO L226 Difference]: Without dead ends: 0 [2021-12-14 14:20:58,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2021-12-14 14:20:58,645 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:20:58,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 119 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 14:20:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-14 14:20:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-14 14:20:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 14:20:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-14 14:20:58,648 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2021-12-14 14:20:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:20:58,648 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-14 14:20:58,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-14 14:20:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-14 14:20:58,648 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-14 14:20:58,651 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 14:20:58,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 14:20:58,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 14:20:58,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-14 14:20:59,362 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-14 14:20:59,363 INFO L854 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (<= |ULTIMATE.start_main_~k~0#1| 10)) (.cse2 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)))) (or (and .cse0 (= 6 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 (= 6 |ULTIMATE.start_main_~c~0#1|) (< 5 |ULTIMATE.start_main_~k~0#1|)) (and .cse0 (= 3 |ULTIMATE.start_main_~y~0#1|) .cse1 (< 2 |ULTIMATE.start_main_~k~0#1|) (= 3 |ULTIMATE.start_main_~c~0#1|) .cse2) (and .cse0 (<= 10 |ULTIMATE.start_main_~c~0#1|) (< 9 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 10) .cse1 (= |ULTIMATE.start_main_~y~0#1| 10) .cse2) (and .cse0 .cse1 (= |ULTIMATE.start_main_~c~0#1| 8) (= |ULTIMATE.start_main_~y~0#1| 8) (< 7 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) .cse1 .cse2 (= 2 |ULTIMATE.start_main_~c~0#1|)) (and .cse0 (= 7 |ULTIMATE.start_main_~c~0#1|) (= 7 |ULTIMATE.start_main_~y~0#1|) .cse1 (< 6 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) .cse1 (< 0 |ULTIMATE.start_main_~k~0#1|) .cse2) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) .cse1 .cse2) (and .cse0 (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) (= 5 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) .cse1 (= |ULTIMATE.start_main_~c~0#1| 4) .cse2) (and .cse0 (= 9 |ULTIMATE.start_main_~c~0#1|) .cse1 (< 8 |ULTIMATE.start_main_~k~0#1|) .cse2 (= 9 |ULTIMATE.start_main_~y~0#1|)))) [2021-12-14 14:20:59,363 INFO L854 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)))) (or (and (<= |ULTIMATE.start_main_~k~0#1| 1) (<= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) (< 0 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (<= |ULTIMATE.start_main_~c~0#1| 5) (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 5) .cse0) (and (<= |ULTIMATE.start_main_~k~0#1| 9) (< 8 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 9) .cse0 (= 9 |ULTIMATE.start_main_~y~0#1|)) (and (<= |ULTIMATE.start_main_~c~0#1| 8) (<= |ULTIMATE.start_main_~k~0#1| 8) (= |ULTIMATE.start_main_~y~0#1| 8) (< 7 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (= 7 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 7) (< 6 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 7) .cse0) (and (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0)) (and (<= |ULTIMATE.start_main_~k~0#1| 2) (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 2) .cse0) (and (= 3 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 3) (< 2 |ULTIMATE.start_main_~k~0#1|) .cse0 (<= |ULTIMATE.start_main_~c~0#1| 3)) (and (< 9 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 10) (<= |ULTIMATE.start_main_~k~0#1| 10) (= |ULTIMATE.start_main_~y~0#1| 10) .cse0) (and (<= |ULTIMATE.start_main_~c~0#1| 4) (= |ULTIMATE.start_main_~y~0#1| 4) (<= |ULTIMATE.start_main_~k~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) .cse0) (and (= 6 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 6) (<= |ULTIMATE.start_main_~c~0#1| 6) .cse0 (< 5 |ULTIMATE.start_main_~k~0#1|)))) [2021-12-14 14:20:59,363 INFO L858 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-12-14 14:20:59,363 INFO L858 garLoopResultBuilder]: For program point L38(line 38) no Hoare annotation was computed. [2021-12-14 14:20:59,363 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-14 14:20:59,363 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-14 14:20:59,363 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-14 14:20:59,364 INFO L854 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) (.cse1 (<= |ULTIMATE.start_main_~k~0#1| 10)) (.cse2 (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)))) (or (and .cse0 (= 6 |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 (= 6 |ULTIMATE.start_main_~c~0#1|) (< 5 |ULTIMATE.start_main_~k~0#1|)) (and .cse0 (= 3 |ULTIMATE.start_main_~y~0#1|) .cse1 (< 2 |ULTIMATE.start_main_~k~0#1|) (= 3 |ULTIMATE.start_main_~c~0#1|) .cse2) (and .cse0 (<= 10 |ULTIMATE.start_main_~c~0#1|) (< 9 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~c~0#1| 10) .cse1 (= |ULTIMATE.start_main_~y~0#1| 10) .cse2) (and .cse0 .cse1 (= |ULTIMATE.start_main_~c~0#1| 8) (= |ULTIMATE.start_main_~y~0#1| 8) (< 7 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (= 2 |ULTIMATE.start_main_~y~0#1|) (< 1 |ULTIMATE.start_main_~k~0#1|) .cse1 .cse2 (= 2 |ULTIMATE.start_main_~c~0#1|)) (and .cse0 (= 7 |ULTIMATE.start_main_~c~0#1|) (= 7 |ULTIMATE.start_main_~y~0#1|) .cse1 (< 6 |ULTIMATE.start_main_~k~0#1|) .cse2) (and .cse0 (= |ULTIMATE.start_main_~c~0#1| 1) (= |ULTIMATE.start_main_~y~0#1| 1) .cse1 (< 0 |ULTIMATE.start_main_~k~0#1|) .cse2) (and (<= 0 |ULTIMATE.start_main_~k~0#1|) .cse0 (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start_main_~y~0#1| 0) .cse1 .cse2) (and .cse0 (= 5 |ULTIMATE.start_main_~y~0#1|) (< 4 |ULTIMATE.start_main_~k~0#1|) (= 5 |ULTIMATE.start_main_~c~0#1|) .cse1 .cse2) (and .cse0 (= |ULTIMATE.start_main_~y~0#1| 4) (< 3 |ULTIMATE.start_main_~k~0#1|) .cse1 (= |ULTIMATE.start_main_~c~0#1| 4) .cse2) (and .cse0 (= 9 |ULTIMATE.start_main_~c~0#1|) .cse1 (< 8 |ULTIMATE.start_main_~k~0#1|) .cse2 (= 9 |ULTIMATE.start_main_~y~0#1|)))) [2021-12-14 14:20:59,364 INFO L858 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-12-14 14:20:59,372 INFO L861 garLoopResultBuilder]: At program point L39(lines 17 40) the Hoare annotation is: true [2021-12-14 14:20:59,372 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-12-14 14:20:59,372 INFO L854 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 4 |ULTIMATE.start_main_~x~0#1|)) [2021-12-14 14:20:59,372 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-12-14 14:20:59,372 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-12-14 14:20:59,372 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-12-14 14:20:59,372 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-12-14 14:20:59,373 INFO L858 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-12-14 14:20:59,373 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-12-14 14:20:59,375 INFO L732 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2021-12-14 14:20:59,376 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 14:20:59,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 02:20:59 BoogieIcfgContainer [2021-12-14 14:20:59,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 14:20:59,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 14:20:59,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 14:20:59,389 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 14:20:59,389 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:20:46" (3/4) ... [2021-12-14 14:20:59,391 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-14 14:20:59,395 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-14 14:20:59,397 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-14 14:20:59,397 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-14 14:20:59,397 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-14 14:20:59,397 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-14 14:20:59,416 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 14:20:59,416 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 14:20:59,417 INFO L158 Benchmark]: Toolchain (without parser) took 13272.67ms. Allocated memory was 79.7MB in the beginning and 142.6MB in the end (delta: 62.9MB). Free memory was 44.4MB in the beginning and 52.2MB in the end (delta: -7.8MB). Peak memory consumption was 55.3MB. Max. memory is 16.1GB. [2021-12-14 14:20:59,417 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory was 60.5MB in the beginning and 60.5MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 14:20:59,417 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.63ms. Allocated memory is still 79.7MB. Free memory was 44.2MB in the beginning and 57.2MB in the end (delta: -12.9MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2021-12-14 14:20:59,417 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.24ms. Allocated memory is still 79.7MB. Free memory was 57.2MB in the beginning and 55.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 14:20:59,418 INFO L158 Benchmark]: Boogie Preprocessor took 26.18ms. Allocated memory is still 79.7MB. Free memory was 55.6MB in the beginning and 54.6MB in the end (delta: 978.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 14:20:59,418 INFO L158 Benchmark]: RCFGBuilder took 227.33ms. Allocated memory is still 79.7MB. Free memory was 54.6MB in the beginning and 45.8MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 14:20:59,418 INFO L158 Benchmark]: TraceAbstraction took 12777.58ms. Allocated memory was 79.7MB in the beginning and 142.6MB in the end (delta: 62.9MB). Free memory was 45.3MB in the beginning and 55.4MB in the end (delta: -10.1MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2021-12-14 14:20:59,418 INFO L158 Benchmark]: Witness Printer took 27.50ms. Allocated memory is still 142.6MB. Free memory was 55.4MB in the beginning and 52.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-14 14:20:59,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 79.7MB. Free memory was 60.5MB in the beginning and 60.5MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.63ms. Allocated memory is still 79.7MB. Free memory was 44.2MB in the beginning and 57.2MB in the end (delta: -12.9MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.24ms. Allocated memory is still 79.7MB. Free memory was 57.2MB in the beginning and 55.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.18ms. Allocated memory is still 79.7MB. Free memory was 55.6MB in the beginning and 54.6MB in the end (delta: 978.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 227.33ms. Allocated memory is still 79.7MB. Free memory was 54.6MB in the beginning and 45.8MB in the end (delta: 8.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 12777.58ms. Allocated memory was 79.7MB in the beginning and 142.6MB in the end (delta: 62.9MB). Free memory was 45.3MB in the beginning and 55.4MB in the end (delta: -10.1MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. * Witness Printer took 27.50ms. Allocated memory is still 142.6MB. Free memory was 55.4MB in the beginning and 52.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.7s, OverallIterations: 14, TraceHistogramMax: 13, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 37 mSDsluCounter, 2785 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2393 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1755 IncrementalHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 392 mSDtfsCounter, 1755 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 890 GetRequests, 689 SyntacticMatches, 11 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=13, InterpolantAutomatonStates: 142, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 34 PreInvPairs, 70 NumberOfFragments, 1127 HoareAnnotationTreeSize, 34 FomulaSimplifications, 198 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 661 NumberOfCodeBlocks, 657 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 662 ConstructedInterpolants, 0 QuantifiedInterpolants, 2628 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1815 ConjunctsInSsa, 338 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 1502/2164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((cond == 1 && 6 == y) && k <= 10) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 6 == c) && 5 < k) || (((((cond == 1 && 3 == y) && k <= 10) && 2 < k) && 3 == c) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || ((((((cond == 1 && 10 <= c) && 9 < k) && c <= 10) && k <= 10) && y == 10) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || (((((cond == 1 && k <= 10) && c == 8) && y == 8) && 7 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || (((((cond == 1 && 2 == y) && 1 < k) && k <= 10) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 2 == c)) || (((((cond == 1 && 7 == c) && 7 == y) && k <= 10) && 6 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || (((((cond == 1 && c == 1) && y == 1) && k <= 10) && 0 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || (((((0 <= k && cond == 1) && c == 0) && y == 0) && k <= 10) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || (((((cond == 1 && 5 == y) && 4 < k) && 5 == c) && k <= 10) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || (((((cond == 1 && y == 4) && 3 < k) && k <= 10) && c == 4) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x)) || (((((cond == 1 && 9 == c) && k <= 10) && 8 < k) && 2 * (y * y * y) + y * y * y * y + y * y == 4 * x) && 9 == y) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-14 14:20:59,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE