./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/LogRecursive.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/LogRecursive.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e724a514255a950b17f8b31ed081620ead5e2540931c6bb88a6923d310e5f391 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:27:32,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:27:32,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:27:32,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:27:32,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:27:32,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:27:32,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:27:32,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:27:32,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:27:32,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:27:32,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:27:32,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:27:32,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:27:32,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:27:32,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:27:32,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:27:32,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:27:32,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:27:32,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:27:32,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:27:32,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:27:32,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:27:32,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:27:32,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:27:32,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:27:32,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:27:32,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:27:32,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:27:32,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:27:32,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:27:32,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:27:32,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:27:32,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:27:32,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:27:32,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:27:32,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:27:32,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:27:32,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:27:32,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:27:32,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:27:32,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:27:32,712 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-22 19:27:32,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:27:32,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:27:32,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:27:32,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:27:32,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:27:32,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:27:32,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:27:32,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:27:32,730 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:27:32,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:27:32,730 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:27:32,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:27:32,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:27:32,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 19:27:32,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:27:32,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 19:27:32,731 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-22 19:27:32,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:27:32,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:27:32,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 19:27:32,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:27:32,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:27:32,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:27:32,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:27:32,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:27:32,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:27:32,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 19:27:32,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:27:32,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:27:32,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 19:27:32,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:27:32,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e724a514255a950b17f8b31ed081620ead5e2540931c6bb88a6923d310e5f391 [2021-12-22 19:27:32,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:27:32,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:27:32,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:27:32,903 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:27:32,903 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:27:32,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/LogRecursive.c [2021-12-22 19:27:32,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc84cfe1/c7457f34e73b48c5a10b4042a0d953e4/FLAGd3eb634f5 [2021-12-22 19:27:33,254 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:27:33,254 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/LogRecursive.c [2021-12-22 19:27:33,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc84cfe1/c7457f34e73b48c5a10b4042a0d953e4/FLAGd3eb634f5 [2021-12-22 19:27:33,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cc84cfe1/c7457f34e73b48c5a10b4042a0d953e4 [2021-12-22 19:27:33,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:27:33,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:27:33,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:27:33,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:27:33,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:27:33,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f3917bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33, skipping insertion in model container [2021-12-22 19:27:33,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:27:33,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:27:33,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:27:33,841 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:27:33,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:27:33,867 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:27:33,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33 WrapperNode [2021-12-22 19:27:33,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:27:33,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:27:33,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:27:33,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:27:33,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,890 INFO L137 Inliner]: procedures = 6, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-22 19:27:33,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:27:33,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:27:33,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:27:33,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:27:33,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:27:33,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:27:33,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:27:33,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:27:33,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (1/1) ... [2021-12-22 19:27:33,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:27:33,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:33,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 19:27:33,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 19:27:33,995 INFO L130 BoogieDeclarations]: Found specification of procedure _log [2021-12-22 19:27:33,996 INFO L138 BoogieDeclarations]: Found implementation of procedure _log [2021-12-22 19:27:33,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:27:33,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:27:34,029 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:27:34,030 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:27:34,102 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:27:34,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:27:34,108 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 19:27:34,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:27:34 BoogieIcfgContainer [2021-12-22 19:27:34,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:27:34,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:27:34,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:27:34,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:27:34,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:27:33" (1/3) ... [2021-12-22 19:27:34,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c0c50b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:27:34, skipping insertion in model container [2021-12-22 19:27:34,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:27:33" (2/3) ... [2021-12-22 19:27:34,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c0c50b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:27:34, skipping insertion in model container [2021-12-22 19:27:34,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:27:34" (3/3) ... [2021-12-22 19:27:34,117 INFO L111 eAbstractionObserver]: Analyzing ICFG LogRecursive.c [2021-12-22 19:27:34,120 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:27:34,120 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-12-22 19:27:34,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:27:34,172 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 19:27:34,172 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-22 19:27:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 19 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) [2021-12-22 19:27:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:27:34,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:34,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:34,205 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting _logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:27:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:34,208 INFO L85 PathProgramCache]: Analyzing trace with hash -211694171, now seen corresponding path program 1 times [2021-12-22 19:27:34,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:34,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786301115] [2021-12-22 19:27:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:34,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:34,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:27:34,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015482003] [2021-12-22 19:27:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:34,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:34,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:27:34,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 19:27:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:34,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:27:34,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:27:34,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:27:34,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786301115] [2021-12-22 19:27:34,396 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:27:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015482003] [2021-12-22 19:27:34,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015482003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:34,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:34,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 19:27:34,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885137930] [2021-12-22 19:27:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:34,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 19:27:34,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 19:27:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:27:34,419 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 19 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 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-12-22 19:27:34,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:34,480 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-12-22 19:27:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:27:34,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 8 [2021-12-22 19:27:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:34,486 INFO L225 Difference]: With dead ends: 25 [2021-12-22 19:27:34,487 INFO L226 Difference]: Without dead ends: 19 [2021-12-22 19:27:34,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-22 19:27:34,491 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:34,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-22 19:27:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-12-22 19:27:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 14 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) [2021-12-22 19:27:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-12-22 19:27:34,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 8 [2021-12-22 19:27:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:34,520 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-12-22 19:27:34,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-12-22 19:27:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-12-22 19:27:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 19:27:34,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:34,522 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:34,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:34,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-22 19:27:34,740 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:27:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -768770172, now seen corresponding path program 1 times [2021-12-22 19:27:34,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:34,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542795146] [2021-12-22 19:27:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:34,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:34,762 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:27:34,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727010385] [2021-12-22 19:27:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:34,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:34,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:34,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:27:34,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 19:27:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 19:27:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:27:34,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:27:34,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542795146] [2021-12-22 19:27:34,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:27:34,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727010385] [2021-12-22 19:27:34,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727010385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:34,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:34,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:27:34,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273280539] [2021-12-22 19:27:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:34,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:27:34,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:27:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:27:34,865 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 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) [2021-12-22 19:27:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:34,879 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-12-22 19:27:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:27:34,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 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) Word has length 16 [2021-12-22 19:27:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:34,881 INFO L225 Difference]: With dead ends: 23 [2021-12-22 19:27:34,882 INFO L226 Difference]: Without dead ends: 22 [2021-12-22 19:27:34,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:27:34,883 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:34,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-22 19:27:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-12-22 19:27:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 19:27:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-12-22 19:27:34,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2021-12-22 19:27:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:34,892 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-12-22 19:27:34,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 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) [2021-12-22 19:27:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-12-22 19:27:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 19:27:34,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:34,894 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:34,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:35,110 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,SelfDestructingSolverStorable1 [2021-12-22 19:27:35,110 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting _logErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:27:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:35,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1937928487, now seen corresponding path program 1 times [2021-12-22 19:27:35,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:35,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49179726] [2021-12-22 19:27:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:35,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:35,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:27:35,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639959646] [2021-12-22 19:27:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:35,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:35,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:35,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:27:35,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 19:27:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 19:27:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:27:35,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 19:27:35,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49179726] [2021-12-22 19:27:35,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:27:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639959646] [2021-12-22 19:27:35,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639959646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:27:35,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:27:35,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:27:35,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642794931] [2021-12-22 19:27:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:27:35,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:27:35,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:27:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:27:35,238 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 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) [2021-12-22 19:27:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:35,245 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-12-22 19:27:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:27:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 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) Word has length 17 [2021-12-22 19:27:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:35,246 INFO L225 Difference]: With dead ends: 21 [2021-12-22 19:27:35,246 INFO L226 Difference]: Without dead ends: 20 [2021-12-22 19:27:35,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:27:35,248 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:35,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-22 19:27:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-22 19:27:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 19:27:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-22 19:27:35,256 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-12-22 19:27:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:35,256 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-22 19:27:35,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 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) [2021-12-22 19:27:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-22 19:27:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 19:27:35,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:35,257 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:35,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:35,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:35,457 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:27:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:35,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1374727458, now seen corresponding path program 1 times [2021-12-22 19:27:35,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:35,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333436499] [2021-12-22 19:27:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:35,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:35,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:27:35,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917198159] [2021-12-22 19:27:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:35,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:35,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:35,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:27:35,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 19:27:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:27:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 19:27:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 19:27:35,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 19:27:35,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333436499] [2021-12-22 19:27:35,676 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:27:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917198159] [2021-12-22 19:27:35,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917198159] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:35,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 19:27:35,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-12-22 19:27:35,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886360161] [2021-12-22 19:27:35,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:35,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 19:27:35,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 19:27:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 19:27:35,678 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 19:27:35,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:35,715 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-12-22 19:27:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 19:27:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2021-12-22 19:27:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:35,716 INFO L225 Difference]: With dead ends: 36 [2021-12-22 19:27:35,716 INFO L226 Difference]: Without dead ends: 35 [2021-12-22 19:27:35,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 19:27:35,717 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:35,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 67 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:27:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-22 19:27:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-22 19:27:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-22 19:27:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-12-22 19:27:35,721 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 26 [2021-12-22 19:27:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:35,722 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-12-22 19:27:35,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 19:27:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-12-22 19:27:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 19:27:35,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:35,723 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:35,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:35,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:35,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:27:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1431216260, now seen corresponding path program 2 times [2021-12-22 19:27:35,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:35,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460884171] [2021-12-22 19:27:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:35,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:35,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:27:35,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187968665] [2021-12-22 19:27:35,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:27:35,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:35,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:27:35,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 19:27:36,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:27:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 19:27:36,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 19:27:36,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 19:27:36,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:36,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460884171] [2021-12-22 19:27:36,734 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:27:36,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187968665] [2021-12-22 19:27:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187968665] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:36,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 19:27:36,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-22 19:27:36,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659067326] [2021-12-22 19:27:36,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:36,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 19:27:36,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 19:27:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-22 19:27:36,736 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 22 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-22 19:27:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:36,799 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-12-22 19:27:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 19:27:36,800 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 22 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 56 [2021-12-22 19:27:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:36,802 INFO L225 Difference]: With dead ends: 66 [2021-12-22 19:27:36,802 INFO L226 Difference]: Without dead ends: 65 [2021-12-22 19:27:36,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-22 19:27:36,803 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:36,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 133 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:27:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-22 19:27:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-22 19:27:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-22 19:27:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-12-22 19:27:36,811 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 56 [2021-12-22 19:27:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:36,811 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-12-22 19:27:36,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 22 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-22 19:27:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-12-22 19:27:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 19:27:36,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:36,813 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:36,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:37,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:37,024 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:27:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2092677636, now seen corresponding path program 3 times [2021-12-22 19:27:37,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:37,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068811525] [2021-12-22 19:27:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:37,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:37,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:27:37,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471375836] [2021-12-22 19:27:37,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:27:37,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:37,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:37,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:27:37,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 19:27:37,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-22 19:27:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:37,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 19:27:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-22 19:27:37,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:27:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-22 19:27:41,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:27:41,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068811525] [2021-12-22 19:27:41,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:27:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471375836] [2021-12-22 19:27:41,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471375836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:27:41,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 19:27:41,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-12-22 19:27:41,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261614528] [2021-12-22 19:27:41,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 19:27:41,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-22 19:27:41,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:27:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-22 19:27:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 19:27:41,013 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 46 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-22 19:27:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:27:41,159 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2021-12-22 19:27:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-22 19:27:41,160 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 46 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) Word has length 116 [2021-12-22 19:27:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:27:41,162 INFO L225 Difference]: With dead ends: 126 [2021-12-22 19:27:41,162 INFO L226 Difference]: Without dead ends: 125 [2021-12-22 19:27:41,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 19:27:41,163 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:27:41,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 133 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:27:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-22 19:27:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-12-22 19:27:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) [2021-12-22 19:27:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-12-22 19:27:41,183 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-12-22 19:27:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:27:41,183 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-12-22 19:27:41,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 46 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2021-12-22 19:27:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-12-22 19:27:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-22 19:27:41,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:27:41,188 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:27:41,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 19:27:41,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:41,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:27:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:27:41,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1041431812, now seen corresponding path program 4 times [2021-12-22 19:27:41,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:27:41,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941250742] [2021-12-22 19:27:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:27:41,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:27:41,412 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:27:41,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496467824] [2021-12-22 19:27:41,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 19:27:41,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:27:41,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:27:41,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:27:41,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 19:27:43,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 19:27:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:27:43,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 19:27:43,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:27:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2554 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2021-12-22 19:27:44,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:28:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2554 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2021-12-22 19:28:22,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:28:22,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941250742] [2021-12-22 19:28:22,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-22 19:28:22,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496467824] [2021-12-22 19:28:22,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496467824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:28:22,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 19:28:22,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2021-12-22 19:28:22,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465226446] [2021-12-22 19:28:22,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 19:28:22,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-22 19:28:22,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:28:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-22 19:28:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2021-12-22 19:28:22,304 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 94 states, 93 states have (on average 2.064516129032258) internal successors, (192), 94 states have internal predecessors, (192), 1 states have call successors, (2), 1 states have call predecessors, (2), 46 states have return successors, (46), 46 states have call predecessors, (46), 1 states have call successors, (46) [2021-12-22 19:28:22,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:28:22,608 INFO L93 Difference]: Finished difference Result 246 states and 270 transitions. [2021-12-22 19:28:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-22 19:28:22,609 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.064516129032258) internal successors, (192), 94 states have internal predecessors, (192), 1 states have call successors, (2), 1 states have call predecessors, (2), 46 states have return successors, (46), 46 states have call predecessors, (46), 1 states have call successors, (46) Word has length 236 [2021-12-22 19:28:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:28:22,611 INFO L225 Difference]: With dead ends: 246 [2021-12-22 19:28:22,611 INFO L226 Difference]: Without dead ends: 245 [2021-12-22 19:28:22,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2021-12-22 19:28:22,614 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 19:28:22,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 133 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 19:28:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-22 19:28:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-12-22 19:28:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 196 states have internal predecessors, (197), 2 states have call successors, (2), 1 states have call predecessors, (2), 47 states have return successors, (47), 47 states have call predecessors, (47), 1 states have call successors, (47) [2021-12-22 19:28:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-12-22 19:28:22,629 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 236 [2021-12-22 19:28:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:28:22,630 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-12-22 19:28:22,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.064516129032258) internal successors, (192), 94 states have internal predecessors, (192), 1 states have call successors, (2), 1 states have call predecessors, (2), 46 states have return successors, (46), 46 states have call predecessors, (46), 1 states have call successors, (46) [2021-12-22 19:28:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-12-22 19:28:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-12-22 19:28:22,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:28:22,636 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:28:22,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 19:28:22,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:22,837 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [_logErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, _logErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:28:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:28:22,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1977991940, now seen corresponding path program 5 times [2021-12-22 19:28:22,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:28:22,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532504988] [2021-12-22 19:28:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:28:22,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:28:22,869 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-22 19:28:22,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425248135] [2021-12-22 19:28:22,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 19:28:22,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:28:22,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:28:22,871 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) [2021-12-22 19:28:22,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process