./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/prodbin-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/prodbin-ll.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 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:13:42,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:13:42,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:13:42,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:13:42,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:13:42,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:13:42,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:13:42,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:13:42,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:13:42,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:13:42,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:13:42,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:13:42,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:13:42,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:13:42,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:13:42,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:13:42,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:13:42,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:13:42,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:13:42,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:13:42,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:13:42,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:13:42,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:13:42,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:13:42,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:13:42,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:13:42,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:13:42,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:13:42,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:13:42,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:13:42,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:13:42,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:13:42,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:13:42,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:13:42,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:13:42,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:13:42,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:13:42,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:13:42,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:13:42,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:13:42,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:13:42,996 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:13:43,016 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:13:43,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:13:43,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:13:43,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:13:43,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:13:43,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:13:43,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:13:43,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:13:43,019 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:13:43,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:13:43,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:13:43,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:13:43,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:13:43,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:13:43,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:13:43,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:13:43,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:13:43,021 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:13:43,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:13:43,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:13:43,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:13:43,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:13:43,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:13:43,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:13:43,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:13:43,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:13:43,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:13:43,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:13:43,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:13:43,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:13:43,022 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:13:43,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:13:43,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:13:43,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:13:43,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 [2021-12-17 11:13:43,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:13:43,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:13:43,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:13:43,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:13:43,213 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:13:43,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/prodbin-ll.c [2021-12-17 11:13:43,258 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/264f82c31/b240a69a615c42eca1c91013146dcf52/FLAG898241124 [2021-12-17 11:13:43,608 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:13:43,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/prodbin-ll.c [2021-12-17 11:13:43,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/264f82c31/b240a69a615c42eca1c91013146dcf52/FLAG898241124 [2021-12-17 11:13:43,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/264f82c31/b240a69a615c42eca1c91013146dcf52 [2021-12-17 11:13:43,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:13:43,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:13:43,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:13:43,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:13:43,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:13:43,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5299b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43, skipping insertion in model container [2021-12-17 11:13:43,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:13:43,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:13:43,783 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/prodbin-ll.c[537,550] [2021-12-17 11:13:43,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:13:43,800 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:13:43,812 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/prodbin-ll.c[537,550] [2021-12-17 11:13:43,817 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:13:43,827 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:13:43,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43 WrapperNode [2021-12-17 11:13:43,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:13:43,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:13:43,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:13:43,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:13:43,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,854 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-12-17 11:13:43,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:13:43,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:13:43,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:13:43,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:13:43,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:13:43,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:13:43,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:13:43,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:13:43,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (1/1) ... [2021-12-17 11:13:43,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:13:43,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:13:43,909 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) [2021-12-17 11:13:43,913 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 [2021-12-17 11:13:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:13:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:13:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:13:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:13:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:13:43,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:13:43,977 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:13:43,978 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:13:44,043 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:13:44,046 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:13:44,047 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 11:13:44,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:13:44 BoogieIcfgContainer [2021-12-17 11:13:44,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:13:44,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:13:44,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:13:44,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:13:44,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:13:43" (1/3) ... [2021-12-17 11:13:44,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23614113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:13:44, skipping insertion in model container [2021-12-17 11:13:44,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:13:43" (2/3) ... [2021-12-17 11:13:44,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23614113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:13:44, skipping insertion in model container [2021-12-17 11:13:44,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:13:44" (3/3) ... [2021-12-17 11:13:44,057 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2021-12-17 11:13:44,061 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:13:44,061 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:13:44,097 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:13:44,102 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 [2021-12-17 11:13:44,103 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:13:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:13:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 11:13:44,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:13:44,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:13:44,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:13:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:13:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash -589251586, now seen corresponding path program 1 times [2021-12-17 11:13:44,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:13:44,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660048438] [2021-12-17 11:13:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:44,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:13:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:13:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:13:44,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:13:44,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660048438] [2021-12-17 11:13:44,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660048438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:13:44,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:13:44,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:13:44,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460420634] [2021-12-17 11:13:44,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:13:44,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:13:44,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:13:44,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:13:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:13:44,267 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:13:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:13:44,284 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-12-17 11:13:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:13:44,286 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 11:13:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:13:44,292 INFO L225 Difference]: With dead ends: 37 [2021-12-17 11:13:44,292 INFO L226 Difference]: Without dead ends: 16 [2021-12-17 11:13:44,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:13:44,308 INFO L933 BasicCegarLoop]: 22 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, 22 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 [2021-12-17 11:13:44,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:13:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-17 11:13:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-17 11:13:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:13:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-12-17 11:13:44,339 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-12-17 11:13:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:13:44,339 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-12-17 11:13:44,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:13:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-12-17 11:13:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 11:13:44,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:13:44,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:13:44,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:13:44,341 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:13:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:13:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1187543236, now seen corresponding path program 1 times [2021-12-17 11:13:44,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:13:44,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951642665] [2021-12-17 11:13:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:44,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:13:44,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:13:44,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603040704] [2021-12-17 11:13:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:44,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:13:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:13:44,375 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) [2021-12-17 11:13:44,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:13:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:13:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 11:13:44,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:13:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:13:44,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:13:44,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:13:44,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951642665] [2021-12-17 11:13:44,528 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:13:44,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603040704] [2021-12-17 11:13:44,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603040704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:13:44,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:13:44,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:13:44,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279221232] [2021-12-17 11:13:44,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:13:44,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:13:44,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:13:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:13:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:13:44,531 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:13:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:13:44,578 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-12-17 11:13:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:13:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 11:13:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:13:44,580 INFO L225 Difference]: With dead ends: 28 [2021-12-17 11:13:44,580 INFO L226 Difference]: Without dead ends: 26 [2021-12-17 11:13:44,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:13:44,583 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:13:44,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:13:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-17 11:13:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-12-17 11:13:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:13:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-17 11:13:44,594 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2021-12-17 11:13:44,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:13:44,595 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-17 11:13:44,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:13:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-17 11:13:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 11:13:44,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:13:44,599 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:13:44,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 11:13:44,818 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 [2021-12-17 11:13:44,819 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:13:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:13:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash -423389445, now seen corresponding path program 1 times [2021-12-17 11:13:44,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:13:44,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025130407] [2021-12-17 11:13:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:44,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:13:44,830 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:13:44,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558058970] [2021-12-17 11:13:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:44,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:13:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:13:44,833 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) [2021-12-17 11:13:44,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:13:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:13:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:13:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:13:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:13:44,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:13:44,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:13:44,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025130407] [2021-12-17 11:13:44,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:13:44,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558058970] [2021-12-17 11:13:44,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558058970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:13:44,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:13:44,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:13:44,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425056800] [2021-12-17 11:13:44,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:13:44,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:13:44,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:13:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:13:44,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:13:44,947 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:13:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:13:45,000 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-12-17 11:13:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:13:45,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-17 11:13:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:13:45,002 INFO L225 Difference]: With dead ends: 32 [2021-12-17 11:13:45,002 INFO L226 Difference]: Without dead ends: 25 [2021-12-17 11:13:45,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:13:45,005 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:13:45,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:13:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-17 11:13:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-12-17 11:13:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:13:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-17 11:13:45,040 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-12-17 11:13:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:13:45,040 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-17 11:13:45,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:13:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-17 11:13:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 11:13:45,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:13:45,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:13:45,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:13:45,259 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 [2021-12-17 11:13:45,259 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:13:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:13:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1566145315, now seen corresponding path program 1 times [2021-12-17 11:13:45,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:13:45,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211433206] [2021-12-17 11:13:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:45,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:13:45,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:13:45,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288161140] [2021-12-17 11:13:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:45,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:13:45,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:13:45,268 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) [2021-12-17 11:13:45,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:13:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:13:45,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 11:13:45,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:13:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:13:45,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:13:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:13:49,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:13:49,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211433206] [2021-12-17 11:13:49,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:13:49,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288161140] [2021-12-17 11:13:49,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288161140] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 11:13:49,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:13:49,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-12-17 11:13:49,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509761945] [2021-12-17 11:13:49,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:13:49,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:13:49,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:13:49,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:13:49,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2021-12-17 11:13:49,948 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:13:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:13:50,706 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-12-17 11:13:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:13:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-17 11:13:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:13:50,707 INFO L225 Difference]: With dead ends: 36 [2021-12-17 11:13:50,707 INFO L226 Difference]: Without dead ends: 34 [2021-12-17 11:13:50,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2021-12-17 11:13:50,708 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 11:13:50,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 11:13:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-17 11:13:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-17 11:13:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 11:13:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-12-17 11:13:50,712 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2021-12-17 11:13:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:13:50,712 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-12-17 11:13:50,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:13:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-12-17 11:13:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 11:13:50,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:13:50,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:13:50,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:13:50,919 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 [2021-12-17 11:13:50,919 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:13:50,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:13:50,920 INFO L85 PathProgramCache]: Analyzing trace with hash 208862047, now seen corresponding path program 1 times [2021-12-17 11:13:50,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:13:50,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438306733] [2021-12-17 11:13:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:50,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:13:50,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:13:50,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123984493] [2021-12-17 11:13:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:50,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:13:50,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:13:50,929 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) [2021-12-17 11:13:50,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:13:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:13:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 11:13:50,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:13:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:13:54,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:13:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:13:55,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:13:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438306733] [2021-12-17 11:13:55,418 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:13:55,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123984493] [2021-12-17 11:13:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123984493] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:13:55,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:13:55,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-12-17 11:13:55,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652133403] [2021-12-17 11:13:55,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:13:55,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 11:13:55,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:13:55,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 11:13:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-17 11:13:55,419 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:13:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:13:56,097 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-17 11:13:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 11:13:56,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-17 11:13:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:13:56,099 INFO L225 Difference]: With dead ends: 57 [2021-12-17 11:13:56,099 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 11:13:56,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-12-17 11:13:56,100 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:13:56,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 68 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 11:13:56,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 11:13:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-17 11:13:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:13:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-17 11:13:56,107 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2021-12-17 11:13:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:13:56,107 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-17 11:13:56,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 11:13:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-17 11:13:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 11:13:56,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:13:56,108 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:13:56,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:13:56,308 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 [2021-12-17 11:13:56,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:13:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:13:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1499753556, now seen corresponding path program 1 times [2021-12-17 11:13:56,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:13:56,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100216582] [2021-12-17 11:13:56,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:56,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:13:56,317 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:13:56,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804082439] [2021-12-17 11:13:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:56,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:13:56,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:13:56,319 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) [2021-12-17 11:13:56,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:13:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:13:56,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 11:13:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:13:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 11:13:56,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:13:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 11:13:56,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:13:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100216582] [2021-12-17 11:13:56,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:13:56,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804082439] [2021-12-17 11:13:56,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804082439] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:13:56,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:13:56,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-12-17 11:13:56,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696516040] [2021-12-17 11:13:56,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:13:56,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 11:13:56,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:13:56,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 11:13:56,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:13:56,518 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:13:58,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:13:58,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:13:58,602 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-12-17 11:13:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 11:13:58,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-12-17 11:13:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:13:58,603 INFO L225 Difference]: With dead ends: 57 [2021-12-17 11:13:58,603 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 11:13:58,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:13:58,604 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:13:58,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 11:13:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 11:13:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-17 11:13:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:13:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2021-12-17 11:13:58,610 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2021-12-17 11:13:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:13:58,611 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2021-12-17 11:13:58,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:13:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2021-12-17 11:13:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 11:13:58,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:13:58,613 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:13:58,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 11:13:58,822 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 [2021-12-17 11:13:58,822 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:13:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:13:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1993243494, now seen corresponding path program 1 times [2021-12-17 11:13:58,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:13:58,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183692963] [2021-12-17 11:13:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:58,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:13:58,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:13:58,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951077573] [2021-12-17 11:13:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:13:58,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:13:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:13:58,830 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) [2021-12-17 11:13:58,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:13:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:13:58,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 11:13:58,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:14:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:14:46,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:14:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 11:14:52,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:14:52,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183692963] [2021-12-17 11:14:52,393 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:14:52,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951077573] [2021-12-17 11:14:52,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951077573] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:14:52,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:14:52,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-12-17 11:14:52,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919187838] [2021-12-17 11:14:52,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:14:52,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 11:14:52,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:14:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 11:14:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=334, Unknown=3, NotChecked=0, Total=420 [2021-12-17 11:14:52,394 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 11:14:54,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:14:57,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:14:57,048 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-12-17 11:14:57,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 11:14:57,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-12-17 11:14:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:14:57,050 INFO L225 Difference]: With dead ends: 83 [2021-12-17 11:14:57,050 INFO L226 Difference]: Without dead ends: 81 [2021-12-17 11:14:57,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=277, Invalid=1052, Unknown=3, NotChecked=0, Total=1332 [2021-12-17 11:14:57,051 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 11:14:57,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 101 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 227 Invalid, 0 Unknown, 29 Unchecked, 3.4s Time] [2021-12-17 11:14:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-17 11:14:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-12-17 11:14:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 11:14:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-12-17 11:14:57,061 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 27 [2021-12-17 11:14:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:14:57,061 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-12-17 11:14:57,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 11:14:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-12-17 11:14:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 11:14:57,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:14:57,063 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 11:14:57,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 11:14:57,275 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 [2021-12-17 11:14:57,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:14:57,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:14:57,276 INFO L85 PathProgramCache]: Analyzing trace with hash 648870724, now seen corresponding path program 2 times [2021-12-17 11:14:57,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:14:57,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153280927] [2021-12-17 11:14:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:14:57,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:14:57,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:14:57,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812356033] [2021-12-17 11:14:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:14:57,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:14:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:14:57,283 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) [2021-12-17 11:14:57,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:14:57,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:14:57,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:14:57,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 11:14:57,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:14:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 11:14:59,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:15:03,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:15:03,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153280927] [2021-12-17 11:15:03,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:15:03,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812356033] [2021-12-17 11:15:03,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812356033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:15:03,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:15:03,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-17 11:15:03,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018974992] [2021-12-17 11:15:03,577 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:15:03,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 11:15:03,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:15:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 11:15:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-12-17 11:15:03,578 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 11:15:05,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:15:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:15:07,546 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2021-12-17 11:15:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 11:15:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2021-12-17 11:15:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:15:07,547 INFO L225 Difference]: With dead ends: 127 [2021-12-17 11:15:07,547 INFO L226 Difference]: Without dead ends: 125 [2021-12-17 11:15:07,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-12-17 11:15:07,548 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:15:07,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 97 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 294 Invalid, 0 Unknown, 30 Unchecked, 1.6s Time] [2021-12-17 11:15:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-17 11:15:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2021-12-17 11:15:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 77 states have internal predecessors, (84), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 11:15:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2021-12-17 11:15:07,566 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 45 [2021-12-17 11:15:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:15:07,567 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2021-12-17 11:15:07,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 11:15:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2021-12-17 11:15:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 11:15:07,570 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:15:07,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 11:15:07,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 11:15:07,787 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 [2021-12-17 11:15:07,788 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:15:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:15:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash 886615773, now seen corresponding path program 3 times [2021-12-17 11:15:07,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:15:07,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869584296] [2021-12-17 11:15:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:15:07,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:15:07,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:15:07,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137120457] [2021-12-17 11:15:07,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:15:07,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:15:07,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:15:07,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:15:07,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 11:15:07,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 11:15:07,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:15:07,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-17 11:15:07,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:15:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 70 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 11:15:09,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:15:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 58 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-17 11:15:09,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:15:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869584296] [2021-12-17 11:15:09,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:15:09,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137120457] [2021-12-17 11:15:09,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137120457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:15:09,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:15:09,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-12-17 11:15:09,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222318059] [2021-12-17 11:15:09,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:15:09,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 11:15:09,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:15:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 11:15:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-17 11:15:09,919 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 11:15:11,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:15:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:15:12,921 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2021-12-17 11:15:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 11:15:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2021-12-17 11:15:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:15:12,923 INFO L225 Difference]: With dead ends: 122 [2021-12-17 11:15:12,923 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 11:15:12,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-12-17 11:15:12,923 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 11:15:12,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 78 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 11:15:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 11:15:12,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-17 11:15:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:15:12,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-17 11:15:12,929 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 54 [2021-12-17 11:15:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:15:12,929 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-17 11:15:12,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 11:15:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-17 11:15:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 11:15:12,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:15:12,930 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-17 11:15:12,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 11:15:13,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 11:15:13,131 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:15:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:15:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2114212193, now seen corresponding path program 2 times [2021-12-17 11:15:13,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:15:13,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733449806] [2021-12-17 11:15:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:15:13,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:15:13,136 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:15:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972926616] [2021-12-17 11:15:13,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:15:13,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:15:13,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:15:13,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:15:13,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 11:15:13,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:15:13,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:15:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 11:15:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:15:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 11:15:52,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:16:15,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:16:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733449806] [2021-12-17 11:16:15,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:16:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972926616] [2021-12-17 11:16:15,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972926616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:16:15,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:16:15,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-17 11:16:15,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623013876] [2021-12-17 11:16:15,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:16:15,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 11:16:15,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:16:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 11:16:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-12-17 11:16:15,609 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 11:16:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:16:18,326 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-12-17 11:16:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 11:16:18,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2021-12-17 11:16:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:16:18,327 INFO L225 Difference]: With dead ends: 71 [2021-12-17 11:16:18,327 INFO L226 Difference]: Without dead ends: 69 [2021-12-17 11:16:18,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=358, Invalid=1712, Unknown=0, NotChecked=0, Total=2070 [2021-12-17 11:16:18,328 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 11:16:18,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 206 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 11:16:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-17 11:16:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2021-12-17 11:16:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 11:16:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-12-17 11:16:18,333 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 54 [2021-12-17 11:16:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:16:18,333 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-12-17 11:16:18,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 11:16:18,333 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-12-17 11:16:18,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 11:16:18,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:16:18,334 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-17 11:16:18,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 11:16:18,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 11:16:18,540 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:16:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:16:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash -371250204, now seen corresponding path program 3 times [2021-12-17 11:16:18,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:16:18,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967788518] [2021-12-17 11:16:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:16:18,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:16:18,545 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:16:18,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008906532] [2021-12-17 11:16:18,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 11:16:18,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:16:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:16:18,546 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 11:16:18,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 11:16:18,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-17 11:16:18,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:16:18,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 11:16:18,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:16:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 26 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 11:16:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:16:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 76 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 11:16:27,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:16:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967788518] [2021-12-17 11:16:27,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:16:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008906532] [2021-12-17 11:16:27,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008906532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:16:27,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:16:27,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 40 [2021-12-17 11:16:27,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764232652] [2021-12-17 11:16:27,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:16:27,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-17 11:16:27,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:16:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-17 11:16:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1159, Unknown=2, NotChecked=0, Total=1560 [2021-12-17 11:16:27,155 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 39 states have internal predecessors, (68), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 11:16:30,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:16:34,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:16:45,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:17:11,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:17:13,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:17:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:17:27,956 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-12-17 11:17:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 11:17:27,957 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 39 states have internal predecessors, (68), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 63 [2021-12-17 11:17:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:17:27,957 INFO L225 Difference]: With dead ends: 74 [2021-12-17 11:17:27,957 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 11:17:27,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=944, Invalid=2836, Unknown=2, NotChecked=0, Total=3782 [2021-12-17 11:17:27,959 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 141 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-12-17 11:17:27,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 64 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 136 Invalid, 2 Unknown, 33 Unchecked, 12.6s Time] [2021-12-17 11:17:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 11:17:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 11:17:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:17:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 11:17:27,959 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2021-12-17 11:17:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:17:27,960 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 11:17:27,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 39 states have internal predecessors, (68), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 11:17:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 11:17:27,960 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 11:17:27,962 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 11:17:27,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 11:17:28,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 11:17:28,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 11:17:37,174 INFO L854 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (<= 0 (div |ULTIMATE.start_main_~y~0#1| 2)) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L33-1(lines 32 43) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L861 garLoopResultBuilder]: At program point L46(lines 20 47) the Hoare annotation is: true [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L44(line 44) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L854 garLoopResultBuilder]: At program point L32-2(lines 32 43) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) (<= 0 (div |ULTIMATE.start_main_~y~0#1| 2)) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1)) [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L854 garLoopResultBuilder]: At program point L32-3(lines 32 43) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* 2 (* |ULTIMATE.start_main_~x~0#1| (div |ULTIMATE.start_main_~y~0#1| 2)))) .cse0) (= |ULTIMATE.start_main_~z~0#1| .cse0) (or (= (+ |ULTIMATE.start_main_~x~0#1| (* 2 (* |ULTIMATE.start_main_~x~0#1| (div (+ |ULTIMATE.start_main_~y~0#1| (- 1)) 2))) |ULTIMATE.start_main_~z~0#1|) .cse0) (not (= 1 (mod |ULTIMATE.start_main_~y~0#1| 2)))) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))) [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L37(lines 37 40) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L37-2(lines 37 40) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2021-12-17 11:17:37,175 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-12-17 11:17:37,181 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1, 1, 1] [2021-12-17 11:17:37,182 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 11:17:37,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 11:17:37 BoogieIcfgContainer [2021-12-17 11:17:37,192 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 11:17:37,194 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 11:17:37,194 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 11:17:37,194 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 11:17:37,194 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:13:44" (3/4) ... [2021-12-17 11:17:37,196 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 11:17:37,202 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-17 11:17:37,207 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-17 11:17:37,208 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 11:17:37,208 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 11:17:37,208 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 11:17:37,226 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 11:17:37,226 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 11:17:37,227 INFO L158 Benchmark]: Toolchain (without parser) took 233601.38ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 77.0MB in the beginning and 54.5MB in the end (delta: 22.5MB). Peak memory consumption was 48.1MB. Max. memory is 16.1GB. [2021-12-17 11:17:37,227 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 104.9MB. Free memory is still 62.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:17:37,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.96ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 76.5MB in the beginning and 108.5MB in the end (delta: -32.0MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2021-12-17 11:17:37,227 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.65ms. Allocated memory is still 132.1MB. Free memory was 108.5MB in the beginning and 107.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:17:37,228 INFO L158 Benchmark]: Boogie Preprocessor took 26.56ms. Allocated memory is still 132.1MB. Free memory was 107.1MB in the beginning and 106.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 11:17:37,228 INFO L158 Benchmark]: RCFGBuilder took 165.72ms. Allocated memory is still 132.1MB. Free memory was 106.1MB in the beginning and 96.7MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 11:17:37,228 INFO L158 Benchmark]: TraceAbstraction took 233143.24ms. Allocated memory is still 132.1MB. Free memory was 96.1MB in the beginning and 57.7MB in the end (delta: 38.5MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. [2021-12-17 11:17:37,228 INFO L158 Benchmark]: Witness Printer took 32.86ms. Allocated memory is still 132.1MB. Free memory was 57.7MB in the beginning and 54.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 11:17:37,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 104.9MB. Free memory is still 62.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.96ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 76.5MB in the beginning and 108.5MB in the end (delta: -32.0MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.65ms. Allocated memory is still 132.1MB. Free memory was 108.5MB in the beginning and 107.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.56ms. Allocated memory is still 132.1MB. Free memory was 107.1MB in the beginning and 106.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 165.72ms. Allocated memory is still 132.1MB. Free memory was 106.1MB in the beginning and 96.7MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 233143.24ms. Allocated memory is still 132.1MB. Free memory was 96.1MB in the beginning and 57.7MB in the end (delta: 38.5MB). Peak memory consumption was 66.4MB. Max. memory is 16.1GB. * Witness Printer took 32.86ms. Allocated memory is still 132.1MB. Free memory was 57.7MB in the beginning and 54.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 233.1s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 78.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 9.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 486 SdHoareTripleChecker+Valid, 24.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 478 mSDsluCounter, 835 SdHoareTripleChecker+Invalid, 23.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 92 IncrementalHoareTripleChecker+Unchecked, 692 mSDsCounter, 274 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1541 IncrementalHoareTripleChecker+Invalid, 1910 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 274 mSolverCounterUnsat, 143 mSDtfsCounter, 1541 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 675 GetRequests, 392 SyntacticMatches, 29 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 3123 ImplicationChecksByTransitivity, 90.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=8, InterpolantAutomatonStates: 146, 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, 11 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 27 PreInvPairs, 61 NumberOfFragments, 92 HoareAnnotationTreeSize, 27 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 3241 FormulaSimplificationTreeSizeReductionInter, 9.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 142.3s InterpolantComputationTime, 336 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 523 ConstructedInterpolants, 10 QuantifiedInterpolants, 6574 SizeOfPredicates, 49 NumberOfNonLiveVariables, 920 ConjunctsInSsa, 247 ConjunctsInUnsatCore, 17 InterpolantComputations, 4 PerfectInterpolantSequences, 516/792 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((1 <= b && y * x + z == a * b) && 0 <= y / 2) && cond == 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-12-17 11:17:37,330 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 Result: TRUE