./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/mannadiv_unwindbound20.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 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:09:16,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:09:16,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:09:16,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:09:16,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:09:16,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:09:16,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:09:16,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:09:16,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:09:16,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:09:16,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:09:16,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:09:16,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:09:16,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:09:16,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:09:16,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:09:16,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:09:16,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:09:16,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:09:16,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:09:16,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:09:16,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:09:16,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:09:16,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:09:16,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:09:16,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:09:16,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:09:16,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:09:16,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:09:16,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:09:16,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:09:16,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:09:16,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:09:16,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:09:16,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:09:16,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:09:16,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:09:16,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:09:16,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:09:16,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:09:16,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:09:16,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:09:16,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:09:16,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:09:16,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:09:16,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:09:16,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:09:16,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:09:16,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:09:16,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:09:16,564 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:09:16,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:09:16,565 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:09:16,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:09:16,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:09:16,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:09:16,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:09:16,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:09:16,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:09:16,566 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:09:16,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:09:16,567 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:09:16,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:09:16,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:09:16,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:09:16,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:09:16,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:09:16,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:09:16,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:09:16,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:09:16,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:09:16,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:09:16,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:09:16,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:09:16,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:09:16,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:09:16,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a3cef13903dd032b032a92c3e6d07b1ee77361a4ee844998d70fb602ded6daa [2021-12-22 11:09:16,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:09:16,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:09:16,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:09:16,753 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:09:16,754 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:09:16,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-12-22 11:09:16,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2bde7d77/14c89c1a7c294aee9513c5fce9035271/FLAGccc7fdcc8 [2021-12-22 11:09:17,132 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:09:17,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-12-22 11:09:17,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2bde7d77/14c89c1a7c294aee9513c5fce9035271/FLAGccc7fdcc8 [2021-12-22 11:09:17,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2bde7d77/14c89c1a7c294aee9513c5fce9035271 [2021-12-22 11:09:17,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:09:17,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:09:17,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:09:17,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:09:17,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:09:17,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef6f6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17, skipping insertion in model container [2021-12-22 11:09:17,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:09:17,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:09:17,276 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/mannadiv_unwindbound20.c[573,586] [2021-12-22 11:09:17,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:09:17,293 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:09:17,301 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/mannadiv_unwindbound20.c[573,586] [2021-12-22 11:09:17,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:09:17,312 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:09:17,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17 WrapperNode [2021-12-22 11:09:17,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:09:17,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:09:17,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:09:17,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:09:17,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,334 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-12-22 11:09:17,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:09:17,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:09:17,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:09:17,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:09:17,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:09:17,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:09:17,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:09:17,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:09:17,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (1/1) ... [2021-12-22 11:09:17,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:09:17,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:09:17,372 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) [2021-12-22 11:09:17,373 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 [2021-12-22 11:09:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:09:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 11:09:17,395 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 11:09:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:09:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:09:17,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:09:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 11:09:17,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 11:09:17,433 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:09:17,434 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:09:17,511 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:09:17,515 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:09:17,516 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:09:17,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:09:17 BoogieIcfgContainer [2021-12-22 11:09:17,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:09:17,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:09:17,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:09:17,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:09:17,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:09:17" (1/3) ... [2021-12-22 11:09:17,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed19a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:09:17, skipping insertion in model container [2021-12-22 11:09:17,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:09:17" (2/3) ... [2021-12-22 11:09:17,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed19a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:09:17, skipping insertion in model container [2021-12-22 11:09:17,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:09:17" (3/3) ... [2021-12-22 11:09:17,529 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2021-12-22 11:09:17,532 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:09:17,532 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:09:17,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:09:17,564 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 [2021-12-22 11:09:17,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:09:17,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 11:09:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 11:09:17,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:09:17,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:09:17,579 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:09:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:09:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2021-12-22 11:09:17,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:09:17,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042183522] [2021-12-22 11:09:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:17,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:09:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:09:17,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:09:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:09:17,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 11:09:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:09:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:09:17,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:09:17,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042183522] [2021-12-22 11:09:17,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042183522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:09:17,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:09:17,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:09:17,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997259598] [2021-12-22 11:09:17,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:09:17,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:09:17,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:09:17,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:09:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:09:17,789 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 11:09:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:09:17,800 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-12-22 11:09:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:09:17,802 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-22 11:09:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:09:17,806 INFO L225 Difference]: With dead ends: 47 [2021-12-22 11:09:17,807 INFO L226 Difference]: Without dead ends: 21 [2021-12-22 11:09:17,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:09:17,811 INFO L933 BasicCegarLoop]: 29 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, 29 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 [2021-12-22 11:09:17,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:09:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-22 11:09:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-22 11:09:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 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) [2021-12-22 11:09:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-22 11:09:17,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2021-12-22 11:09:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:09:17,863 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-22 11:09:17,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 11:09:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-22 11:09:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 11:09:17,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:09:17,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:09:17,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:09:17,867 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:09:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:09:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2021-12-22 11:09:17,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:09:17,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842495388] [2021-12-22 11:09:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:17,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:09:17,897 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:09:17,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846760327] [2021-12-22 11:09:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:17,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:09:17,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:09:17,901 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) [2021-12-22 11:09:17,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:09:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:09:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 11:09:17,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:09:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:09:18,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:09:18,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:09:18,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842495388] [2021-12-22 11:09:18,009 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 11:09:18,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846760327] [2021-12-22 11:09:18,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846760327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:09:18,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:09:18,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:09:18,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665136510] [2021-12-22 11:09:18,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:09:18,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:09:18,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:09:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:09:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:09:18,012 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 11:09:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:09:18,023 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-22 11:09:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:09:18,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-22 11:09:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:09:18,024 INFO L225 Difference]: With dead ends: 30 [2021-12-22 11:09:18,024 INFO L226 Difference]: Without dead ends: 23 [2021-12-22 11:09:18,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:09:18,026 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:09:18,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:09:18,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-22 11:09:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-22 11:09:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-12-22 11:09:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-22 11:09:18,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2021-12-22 11:09:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:09:18,031 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-22 11:09:18,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 11:09:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-22 11:09:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 11:09:18,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:09:18,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:09:18,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:09:18,243 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 [2021-12-22 11:09:18,245 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:09:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:09:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2021-12-22 11:09:18,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:09:18,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515936580] [2021-12-22 11:09:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:18,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:09:18,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:09:18,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287465914] [2021-12-22 11:09:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:18,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:09:18,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:09:18,273 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) [2021-12-22 11:09:18,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:09:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:09:18,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 11:09:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:09:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:09:18,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 11:09:18,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:09:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515936580] [2021-12-22 11:09:18,554 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 11:09:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287465914] [2021-12-22 11:09:18,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287465914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:09:18,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:09:18,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:09:18,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260235826] [2021-12-22 11:09:18,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:09:18,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:09:18,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:09:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:09:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:09:18,558 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 11:09:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:09:18,632 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-12-22 11:09:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:09:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-22 11:09:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:09:18,636 INFO L225 Difference]: With dead ends: 33 [2021-12-22 11:09:18,636 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 11:09:18,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:09:18,639 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:09:18,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:09:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 11:09:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-22 11:09:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 11:09:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-22 11:09:18,651 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2021-12-22 11:09:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:09:18,651 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-22 11:09:18,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 11:09:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-22 11:09:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 11:09:18,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:09:18,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:09:18,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:09:18,866 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 [2021-12-22 11:09:18,866 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:09:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:09:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2021-12-22 11:09:18,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:09:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253036553] [2021-12-22 11:09:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:18,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:09:18,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:09:18,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592689012] [2021-12-22 11:09:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:18,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:09:18,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:09:18,876 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) [2021-12-22 11:09:18,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 11:09:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:09:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 11:09:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:09:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:09:19,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:09:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:09:19,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:09:19,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253036553] [2021-12-22 11:09:19,160 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 11:09:19,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592689012] [2021-12-22 11:09:19,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592689012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:09:19,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 11:09:19,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-22 11:09:19,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990936007] [2021-12-22 11:09:19,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 11:09:19,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 11:09:19,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:09:19,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 11:09:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-22 11:09:19,163 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 11:09:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:09:19,228 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-12-22 11:09:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 11:09:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2021-12-22 11:09:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:09:19,232 INFO L225 Difference]: With dead ends: 35 [2021-12-22 11:09:19,232 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 11:09:19,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:09:19,233 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:09:19,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:09:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 11:09:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-12-22 11:09:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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) [2021-12-22 11:09:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-12-22 11:09:19,239 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2021-12-22 11:09:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:09:19,241 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-12-22 11:09:19,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 11:09:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-12-22 11:09:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 11:09:19,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:09:19,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:09:19,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 11:09:19,455 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 [2021-12-22 11:09:19,456 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:09:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:09:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2021-12-22 11:09:19,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:09:19,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570769449] [2021-12-22 11:09:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:19,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:09:19,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:09:19,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115071593] [2021-12-22 11:09:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:19,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:09:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:09:19,465 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) [2021-12-22 11:09:19,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 11:09:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:09:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 11:09:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:09:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:09:19,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:09:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:09:19,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:09:19,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570769449] [2021-12-22 11:09:19,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 11:09:19,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115071593] [2021-12-22 11:09:19,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115071593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:09:19,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 11:09:19,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-22 11:09:19,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712726768] [2021-12-22 11:09:19,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 11:09:19,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:09:19,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:09:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:09:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:09:19,632 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 11:09:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:09:19,675 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-12-22 11:09:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:09:19,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2021-12-22 11:09:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:09:19,676 INFO L225 Difference]: With dead ends: 57 [2021-12-22 11:09:19,677 INFO L226 Difference]: Without dead ends: 52 [2021-12-22 11:09:19,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:09:19,677 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:09:19,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 93 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:09:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-22 11:09:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-22 11:09:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 11:09:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-22 11:09:19,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2021-12-22 11:09:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:09:19,683 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-22 11:09:19,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-22 11:09:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-22 11:09:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 11:09:19,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:09:19,685 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:09:19,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 11:09:19,891 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 [2021-12-22 11:09:19,891 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:09:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:09:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash 972990450, now seen corresponding path program 2 times [2021-12-22 11:09:19,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:09:19,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138456743] [2021-12-22 11:09:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:19,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:09:19,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:09:19,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071810717] [2021-12-22 11:09:19,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 11:09:19,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:09:19,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:09:19,905 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) [2021-12-22 11:09:19,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 11:09:19,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 11:09:19,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:09:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 11:09:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:09:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:09:20,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:09:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 11:09:20,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:09:20,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138456743] [2021-12-22 11:09:20,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 11:09:20,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071810717] [2021-12-22 11:09:20,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071810717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:09:20,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 11:09:20,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-22 11:09:20,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424288779] [2021-12-22 11:09:20,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 11:09:20,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 11:09:20,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:09:20,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 11:09:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:09:20,179 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-22 11:09:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:09:20,296 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2021-12-22 11:09:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 11:09:20,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 55 [2021-12-22 11:09:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:09:20,298 INFO L225 Difference]: With dead ends: 111 [2021-12-22 11:09:20,298 INFO L226 Difference]: Without dead ends: 106 [2021-12-22 11:09:20,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-12-22 11:09:20,299 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:09:20,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 175 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:09:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-22 11:09:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-22 11:09:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-22 11:09:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-12-22 11:09:20,312 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 55 [2021-12-22 11:09:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:09:20,313 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-12-22 11:09:20,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-22 11:09:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-12-22 11:09:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-22 11:09:20,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:09:20,314 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:09:20,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 11:09:20,533 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 [2021-12-22 11:09:20,533 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:09:20,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:09:20,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1909967598, now seen corresponding path program 3 times [2021-12-22 11:09:20,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:09:20,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874504364] [2021-12-22 11:09:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:20,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:09:20,543 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:09:20,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129850711] [2021-12-22 11:09:20,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 11:09:20,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:09:20,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:09:20,545 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) [2021-12-22 11:09:20,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 11:09:20,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-22 11:09:20,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:09:20,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 11:09:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:09:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:09:20,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:09:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-22 11:09:21,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:09:21,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874504364] [2021-12-22 11:09:21,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 11:09:21,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129850711] [2021-12-22 11:09:21,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129850711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:09:21,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 11:09:21,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-12-22 11:09:21,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547284313] [2021-12-22 11:09:21,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 11:09:21,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 11:09:21,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:09:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 11:09:21,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-12-22 11:09:21,103 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 24 states have internal predecessors, (128), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-12-22 11:09:21,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:09:21,382 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2021-12-22 11:09:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-22 11:09:21,383 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 24 states have internal predecessors, (128), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) Word has length 109 [2021-12-22 11:09:21,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:09:21,384 INFO L225 Difference]: With dead ends: 201 [2021-12-22 11:09:21,384 INFO L226 Difference]: Without dead ends: 196 [2021-12-22 11:09:21,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 11:09:21,386 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 198 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:09:21,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 226 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:09:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-22 11:09:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-12-22 11:09:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 151 states have (on average 1.1390728476821192) internal successors, (172), 151 states have internal predecessors, (172), 23 states have call successors, (23), 22 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-22 11:09:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 217 transitions. [2021-12-22 11:09:21,399 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 217 transitions. Word has length 109 [2021-12-22 11:09:21,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:09:21,400 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 217 transitions. [2021-12-22 11:09:21,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 24 states have internal predecessors, (128), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2021-12-22 11:09:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 217 transitions. [2021-12-22 11:09:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-22 11:09:21,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:09:21,402 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:09:21,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 11:09:21,615 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 [2021-12-22 11:09:21,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:09:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:09:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash 32762610, now seen corresponding path program 4 times [2021-12-22 11:09:21,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:09:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205073442] [2021-12-22 11:09:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:09:21,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:09:21,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 11:09:21,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603663582] [2021-12-22 11:09:21,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 11:09:21,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:09:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:09:21,637 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) [2021-12-22 11:09:21,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 11:09:21,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 11:09:21,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-12-22 11:09:21,723 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 11:09:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 11:09:21,834 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 11:09:21,835 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 11:09:21,835 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 11:09:21,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 11:09:22,058 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 [2021-12-22 11:09:22,061 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2021-12-22 11:09:22,064 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 11:09:22,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 11:09:22 BoogieIcfgContainer [2021-12-22 11:09:22,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 11:09:22,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 11:09:22,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 11:09:22,139 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 11:09:22,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:09:17" (3/4) ... [2021-12-22 11:09:22,141 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-22 11:09:22,226 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 11:09:22,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 11:09:22,227 INFO L158 Benchmark]: Toolchain (without parser) took 5080.35ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 59.9MB in the beginning and 68.8MB in the end (delta: -8.8MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2021-12-22 11:09:22,227 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 11:09:22,228 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.90ms. Allocated memory is still 90.2MB. Free memory was 59.8MB in the beginning and 66.6MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 11:09:22,228 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.62ms. Allocated memory is still 90.2MB. Free memory was 66.6MB in the beginning and 65.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 11:09:22,228 INFO L158 Benchmark]: Boogie Preprocessor took 11.40ms. Allocated memory is still 90.2MB. Free memory was 65.2MB in the beginning and 64.2MB in the end (delta: 984.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 11:09:22,228 INFO L158 Benchmark]: RCFGBuilder took 170.52ms. Allocated memory is still 90.2MB. Free memory was 64.0MB in the beginning and 54.7MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 11:09:22,229 INFO L158 Benchmark]: TraceAbstraction took 4620.90ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 54.4MB in the beginning and 78.2MB in the end (delta: -23.8MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. [2021-12-22 11:09:22,229 INFO L158 Benchmark]: Witness Printer took 87.55ms. Allocated memory is still 113.2MB. Free memory was 78.2MB in the beginning and 68.8MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 11:09:22,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 90.2MB. Free memory is still 47.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.90ms. Allocated memory is still 90.2MB. Free memory was 59.8MB in the beginning and 66.6MB in the end (delta: -6.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.62ms. Allocated memory is still 90.2MB. Free memory was 66.6MB in the beginning and 65.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.40ms. Allocated memory is still 90.2MB. Free memory was 65.2MB in the beginning and 64.2MB in the end (delta: 984.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 170.52ms. Allocated memory is still 90.2MB. Free memory was 64.0MB in the beginning and 54.7MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4620.90ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 54.4MB in the beginning and 78.2MB in the end (delta: -23.8MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. * Witness Printer took 87.55ms. Allocated memory is still 113.2MB. Free memory was 78.2MB in the beginning and 68.8MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. 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 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [counter=0, x1=21, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [counter=0, x1=21, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] EXPR counter++ VAL [counter=1, counter++=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] EXPR counter++ VAL [counter=2, counter++=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] EXPR counter++ VAL [counter=3, counter++=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] EXPR counter++ VAL [counter=4, counter++=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] EXPR counter++ VAL [counter=5, counter++=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] EXPR counter++ VAL [counter=6, counter++=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] EXPR counter++ VAL [counter=7, counter++=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] EXPR counter++ VAL [counter=8, counter++=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] EXPR counter++ VAL [counter=9, counter++=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] EXPR counter++ VAL [counter=10, counter++=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] EXPR counter++ VAL [counter=11, counter++=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=11] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] EXPR counter++ VAL [counter=12, counter++=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=12] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] EXPR counter++ VAL [counter=13, counter++=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=13] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] EXPR counter++ VAL [counter=14, counter++=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=14] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] EXPR counter++ VAL [counter=15, counter++=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=15] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] EXPR counter++ VAL [counter=16, counter++=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=16] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] EXPR counter++ VAL [counter=17, counter++=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=17] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] EXPR counter++ VAL [counter=18, counter++=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=18] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] EXPR counter++ VAL [counter=19, counter++=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=19] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] EXPR counter++ VAL [counter=20, counter++=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, counter=20] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] EXPR counter++ VAL [counter=21, counter++=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] COND FALSE !(counter++<20) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, counter=21] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L18] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 348 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 345 mSDsluCounter, 753 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 571 mSDsCounter, 95 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 336 IncrementalHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 95 mSolverCounterUnsat, 182 mSDtfsCounter, 336 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 506 GetRequests, 411 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=7, InterpolantAutomatonStates: 97, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 472 NumberOfCodeBlocks, 472 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 479 ConstructedInterpolants, 0 QuantifiedInterpolants, 1209 SizeOfPredicates, 25 NumberOfNonLiveVariables, 770 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 310/1086 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 RESULT: Ultimate proved your program to be incorrect! [2021-12-22 11:09:22,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE