./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/TerminatorRec02.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/TerminatorRec02.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 744c3d26555bbd53a7a0d9e7c64efe010ba06d0f67ec9ca21eb74ed1148222d3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 13:48:19,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 13:48:19,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 13:48:19,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 13:48:19,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 13:48:19,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 13:48:19,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 13:48:19,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 13:48:19,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 13:48:19,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 13:48:19,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 13:48:19,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 13:48:19,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 13:48:19,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 13:48:19,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 13:48:19,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 13:48:19,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 13:48:19,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 13:48:19,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 13:48:19,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 13:48:19,687 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 13:48:19,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 13:48:19,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 13:48:19,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 13:48:19,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 13:48:19,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 13:48:19,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 13:48:19,696 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 13:48:19,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 13:48:19,697 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 13:48:19,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 13:48:19,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 13:48:19,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 13:48:19,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 13:48:19,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 13:48:19,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 13:48:19,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 13:48:19,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 13:48:19,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 13:48:19,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 13:48:19,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 13:48:19,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 13:48:19,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-07-14 13:48:19,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 13:48:19,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 13:48:19,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 13:48:19,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 13:48:19,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 13:48:19,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 13:48:19,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 13:48:19,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 13:48:19,727 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 13:48:19,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 13:48:19,728 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 13:48:19,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 13:48:19,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 13:48:19,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-14 13:48:19,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 13:48:19,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-14 13:48:19,729 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-14 13:48:19,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-14 13:48:19,729 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 13:48:19,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-14 13:48:19,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 13:48:19,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 13:48:19,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 13:48:19,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:48:19,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 13:48:19,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 13:48:19,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-14 13:48:19,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 13:48:19,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 13:48:19,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-14 13:48:19,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 744c3d26555bbd53a7a0d9e7c64efe010ba06d0f67ec9ca21eb74ed1148222d3 [2022-07-14 13:48:19,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 13:48:19,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 13:48:19,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 13:48:19,948 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 13:48:19,948 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 13:48:19,949 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2022-07-14 13:48:19,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92e404fc/93c4e2dbe6de4e5da535cc06c5a903c7/FLAG0a9813a59 [2022-07-14 13:48:20,300 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 13:48:20,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/TerminatorRec02.c [2022-07-14 13:48:20,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92e404fc/93c4e2dbe6de4e5da535cc06c5a903c7/FLAG0a9813a59 [2022-07-14 13:48:20,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92e404fc/93c4e2dbe6de4e5da535cc06c5a903c7 [2022-07-14 13:48:20,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 13:48:20,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 13:48:20,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 13:48:20,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 13:48:20,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 13:48:20,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b3d2ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20, skipping insertion in model container [2022-07-14 13:48:20,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 13:48:20,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:48:20,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:48:20,890 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 13:48:20,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:48:20,909 INFO L208 MainTranslator]: Completed translation [2022-07-14 13:48:20,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20 WrapperNode [2022-07-14 13:48:20,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 13:48:20,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 13:48:20,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 13:48:20,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 13:48:20,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,933 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-07-14 13:48:20,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 13:48:20,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 13:48:20,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 13:48:20,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 13:48:20,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 13:48:20,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 13:48:20,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 13:48:20,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 13:48:20,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (1/1) ... [2022-07-14 13:48:20,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:48:20,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:48:21,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 13:48:21,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 13:48:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure fact [2022-07-14 13:48:21,047 INFO L138 BoogieDeclarations]: Found implementation of procedure fact [2022-07-14 13:48:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 13:48:21,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 13:48:21,082 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 13:48:21,083 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 13:48:21,184 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 13:48:21,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 13:48:21,188 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-14 13:48:21,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:48:21 BoogieIcfgContainer [2022-07-14 13:48:21,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 13:48:21,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 13:48:21,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 13:48:21,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 13:48:21,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 01:48:20" (1/3) ... [2022-07-14 13:48:21,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a03008a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:48:21, skipping insertion in model container [2022-07-14 13:48:21,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:48:20" (2/3) ... [2022-07-14 13:48:21,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a03008a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:48:21, skipping insertion in model container [2022-07-14 13:48:21,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:48:21" (3/3) ... [2022-07-14 13:48:21,199 INFO L111 eAbstractionObserver]: Analyzing ICFG TerminatorRec02.c [2022-07-14 13:48:21,209 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 13:48:21,210 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-14 13:48:21,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 13:48:21,262 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76b8781e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@47860828 [2022-07-14 13:48:21,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-14 13:48:21,265 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) [2022-07-14 13:48:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 13:48:21,271 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:48:21,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:48:21,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:48:21,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:48:21,277 INFO L85 PathProgramCache]: Analyzing trace with hash -211694171, now seen corresponding path program 1 times [2022-07-14 13:48:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:48:21,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836210397] [2022-07-14 13:48:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:21,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:48:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:48:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:48:21,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:48:21,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836210397] [2022-07-14 13:48:21,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836210397] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:48:21,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:48:21,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:48:21,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130460088] [2022-07-14 13:48:21,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:48:21,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:48:21,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:48:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:48:21,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:48:21,499 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 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-07-14 13:48:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:48:21,568 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-14 13:48:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 13:48:21,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-07-14 13:48:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:48:21,575 INFO L225 Difference]: With dead ends: 23 [2022-07-14 13:48:21,575 INFO L226 Difference]: Without dead ends: 18 [2022-07-14 13:48:21,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:48:21,582 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:48:21,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:48:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-14 13:48:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-14 13:48:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 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) [2022-07-14 13:48:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-14 13:48:21,611 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2022-07-14 13:48:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:48:21,611 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-14 13:48:21,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-07-14 13:48:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-14 13:48:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 13:48:21,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:48:21,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:48:21,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 13:48:21,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:48:21,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:48:21,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2027415328, now seen corresponding path program 1 times [2022-07-14 13:48:21,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:48:21,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499456812] [2022-07-14 13:48:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:21,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:48:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:48:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:48:21,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:48:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499456812] [2022-07-14 13:48:21,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499456812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:48:21,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:48:21,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:48:21,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983817759] [2022-07-14 13:48:21,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:48:21,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:48:21,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:48:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:48:21,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:48:21,661 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2022-07-14 13:48:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:48:21,673 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-07-14 13:48:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:48:21,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2022-07-14 13:48:21,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:48:21,674 INFO L225 Difference]: With dead ends: 20 [2022-07-14 13:48:21,675 INFO L226 Difference]: Without dead ends: 19 [2022-07-14 13:48:21,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:48:21,676 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:48:21,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:48:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-14 13:48:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-07-14 13:48:21,679 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) [2022-07-14 13:48:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-07-14 13:48:21,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-07-14 13:48:21,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:48:21,680 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-07-14 13:48:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2022-07-14 13:48:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-07-14 13:48:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 13:48:21,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:48:21,682 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:48:21,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 13:48:21,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:48:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:48:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash -768770172, now seen corresponding path program 1 times [2022-07-14 13:48:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:48:21,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395219883] [2022-07-14 13:48:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:21,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:48:21,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:48:21,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976253501] [2022-07-14 13:48:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:21,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:21,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:48:21,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:48:21,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 13:48:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:48:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 13:48:21,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:48:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:48:21,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:48:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:48:21,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:48:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395219883] [2022-07-14 13:48:21,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:48:21,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976253501] [2022-07-14 13:48:21,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976253501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:48:21,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 13:48:21,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-14 13:48:21,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485148110] [2022-07-14 13:48:21,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 13:48:21,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 13:48:21,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:48:21,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 13:48:21,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-14 13:48:21,940 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:48:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:48:22,037 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-07-14 13:48:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 13:48:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-07-14 13:48:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:48:22,039 INFO L225 Difference]: With dead ends: 26 [2022-07-14 13:48:22,039 INFO L226 Difference]: Without dead ends: 25 [2022-07-14 13:48:22,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-07-14 13:48:22,040 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:48:22,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 36 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-07-14 13:48:22,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-14 13:48:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-07-14 13:48:22,043 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) [2022-07-14 13:48:22,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-14 13:48:22,044 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2022-07-14 13:48:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:48:22,044 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-14 13:48:22,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:48:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-14 13:48:22,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-14 13:48:22,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:48:22,045 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:48:22,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 13:48:22,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:22,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:48:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:48:22,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1937928487, now seen corresponding path program 1 times [2022-07-14 13:48:22,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:48:22,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976791323] [2022-07-14 13:48:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:22,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:48:22,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:48:22,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602399625] [2022-07-14 13:48:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:22,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:48:22,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:48:22,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 13:48:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:48:22,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:48:22,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:48:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:48:22,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 13:48:22,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:48:22,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976791323] [2022-07-14 13:48:22,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:48:22,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602399625] [2022-07-14 13:48:22,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602399625] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:48:22,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:48:22,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 13:48:22,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522587924] [2022-07-14 13:48:22,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:48:22,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 13:48:22,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:48:22,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 13:48:22,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-14 13:48:22,344 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-07-14 13:48:22,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:48:22,376 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-07-14 13:48:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 13:48:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) Word has length 17 [2022-07-14 13:48:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:48:22,377 INFO L225 Difference]: With dead ends: 21 [2022-07-14 13:48:22,378 INFO L226 Difference]: Without dead ends: 20 [2022-07-14 13:48:22,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 13:48:22,380 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:48:22,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:48:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-14 13:48:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-14 13:48:22,388 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) [2022-07-14 13:48:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-07-14 13:48:22,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-07-14 13:48:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:48:22,391 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-07-14 13:48:22,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-07-14 13:48:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-07-14 13:48:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 13:48:22,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:48:22,393 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:48:22,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 13:48:22,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-14 13:48:22,600 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:48:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:48:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1374727458, now seen corresponding path program 1 times [2022-07-14 13:48:22,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:48:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108918511] [2022-07-14 13:48:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:22,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:48:22,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:48:22,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747382788] [2022-07-14 13:48:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:22,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:22,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:48:22,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:48:22,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 13:48:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:48:22,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 13:48:22,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:48:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 13:48:22,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:48:23,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:48:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108918511] [2022-07-14 13:48:23,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:48:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747382788] [2022-07-14 13:48:23,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747382788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:48:23,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 13:48:23,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-07-14 13:48:23,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387933121] [2022-07-14 13:48:23,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 13:48:23,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 13:48:23,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:48:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 13:48:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-14 13:48:23,608 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 13:48:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:48:23,813 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-07-14 13:48:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 13:48:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-07-14 13:48:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:48:23,815 INFO L225 Difference]: With dead ends: 29 [2022-07-14 13:48:23,815 INFO L226 Difference]: Without dead ends: 28 [2022-07-14 13:48:23,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-07-14 13:48:23,816 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:48:23,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 50 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:48:23,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-14 13:48:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-07-14 13:48:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 13:48:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-07-14 13:48:23,823 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 26 [2022-07-14 13:48:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:48:23,823 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-07-14 13:48:23,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 13:48:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-07-14 13:48:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 13:48:23,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:48:23,826 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:48:23,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 13:48:24,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:24,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:48:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:48:24,043 INFO L85 PathProgramCache]: Analyzing trace with hash -708839420, now seen corresponding path program 2 times [2022-07-14 13:48:24,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:48:24,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119385748] [2022-07-14 13:48:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:24,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:48:24,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:48:24,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023064734] [2022-07-14 13:48:24,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 13:48:24,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:24,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:48:24,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:48:24,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 13:48:24,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 13:48:24,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:48:24,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 13:48:24,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:48:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 13:48:24,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:48:24,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:48:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119385748] [2022-07-14 13:48:24,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:48:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023064734] [2022-07-14 13:48:24,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023064734] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:48:24,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 13:48:24,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-14 13:48:24,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439637643] [2022-07-14 13:48:24,584 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 13:48:24,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 13:48:24,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:48:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 13:48:24,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-07-14 13:48:24,585 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 13:48:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:48:24,720 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-07-14 13:48:24,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 13:48:24,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-07-14 13:48:24,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:48:24,721 INFO L225 Difference]: With dead ends: 34 [2022-07-14 13:48:24,721 INFO L226 Difference]: Without dead ends: 33 [2022-07-14 13:48:24,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-07-14 13:48:24,722 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:48:24,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 60 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 61 Unchecked, 0.0s Time] [2022-07-14 13:48:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-14 13:48:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-07-14 13:48:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 2 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) [2022-07-14 13:48:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-14 13:48:24,726 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 36 [2022-07-14 13:48:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:48:24,726 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-14 13:48:24,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 13:48:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-14 13:48:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 13:48:24,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:48:24,727 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:48:24,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 13:48:24,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:24,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:48:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:48:24,944 INFO L85 PathProgramCache]: Analyzing trace with hash -2142068702, now seen corresponding path program 3 times [2022-07-14 13:48:24,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:48:24,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777238335] [2022-07-14 13:48:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:24,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:48:24,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:48:24,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840985389] [2022-07-14 13:48:24,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 13:48:24,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:24,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:48:24,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:48:24,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 13:48:24,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 13:48:24,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:48:24,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 13:48:24,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:48:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 13:48:32,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:48:32,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:48:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777238335] [2022-07-14 13:48:32,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:48:32,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840985389] [2022-07-14 13:48:32,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840985389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:48:32,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 13:48:32,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-14 13:48:32,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802141178] [2022-07-14 13:48:32,685 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 13:48:32,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 13:48:32,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:48:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 13:48:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=292, Unknown=6, NotChecked=0, Total=380 [2022-07-14 13:48:32,686 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 13:48:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:48:36,202 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-07-14 13:48:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 13:48:36,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-07-14 13:48:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:48:36,204 INFO L225 Difference]: With dead ends: 45 [2022-07-14 13:48:36,204 INFO L226 Difference]: Without dead ends: 44 [2022-07-14 13:48:36,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=146, Invalid=498, Unknown=6, NotChecked=0, Total=650 [2022-07-14 13:48:36,205 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:48:36,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 67 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 69 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-07-14 13:48:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-14 13:48:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2022-07-14 13:48:36,210 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) [2022-07-14 13:48:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-07-14 13:48:36,211 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 46 [2022-07-14 13:48:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:48:36,211 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-07-14 13:48:36,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 13:48:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-07-14 13:48:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 13:48:36,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:48:36,216 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:48:36,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-14 13:48:36,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:36,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:48:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:48:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1431216260, now seen corresponding path program 4 times [2022-07-14 13:48:36,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:48:36,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506176117] [2022-07-14 13:48:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:48:36,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:48:36,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:48:36,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75653019] [2022-07-14 13:48:36,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 13:48:36,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:48:36,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:48:36,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:48:36,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 13:48:36,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 13:48:36,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:48:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-14 13:48:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:48:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 75 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 13:48:51,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:48:53,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:48:53,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506176117] [2022-07-14 13:48:53,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:48:53,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75653019] [2022-07-14 13:48:53,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75653019] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:48:53,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 13:48:53,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-14 13:48:53,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719389688] [2022-07-14 13:48:53,330 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 13:48:53,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 13:48:53,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:48:53,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 13:48:53,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=676, Unknown=6, NotChecked=0, Total=812 [2022-07-14 13:48:53,331 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-14 13:49:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:49:26,593 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-07-14 13:49:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 13:49:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 56 [2022-07-14 13:49:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:49:26,594 INFO L225 Difference]: With dead ends: 41 [2022-07-14 13:49:26,594 INFO L226 Difference]: Without dead ends: 40 [2022-07-14 13:49:26,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=319, Invalid=1478, Unknown=9, NotChecked=0, Total=1806 [2022-07-14 13:49:26,595 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:49:26,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 65 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-07-14 13:49:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-14 13:49:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-14 13:49:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-14 13:49:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-07-14 13:49:26,599 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 56 [2022-07-14 13:49:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:49:26,600 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-07-14 13:49:26,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 18 states have internal predecessors, (39), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-14 13:49:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-07-14 13:49:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-14 13:49:26,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:49:26,601 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:49:26,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 13:49:26,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:49:26,814 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:49:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:49:26,814 INFO L85 PathProgramCache]: Analyzing trace with hash 973879645, now seen corresponding path program 5 times [2022-07-14 13:49:26,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:49:26,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039968812] [2022-07-14 13:49:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:49:26,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:49:26,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:49:26,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205960777] [2022-07-14 13:49:26,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 13:49:26,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:49:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:49:26,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:49:26,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 13:49:26,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-14 13:49:26,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:49:26,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 13:49:26,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:49:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 46 proven. 86 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-14 13:49:30,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:49:33,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:49:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039968812] [2022-07-14 13:49:33,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:49:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205960777] [2022-07-14 13:49:33,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205960777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:49:33,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 13:49:33,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-07-14 13:49:33,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599021363] [2022-07-14 13:49:33,702 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 13:49:33,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 13:49:33,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:49:33,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 13:49:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=764, Unknown=2, NotChecked=0, Total=930 [2022-07-14 13:49:33,703 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 13:49:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:49:33,929 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-07-14 13:49:33,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 13:49:33,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 71 [2022-07-14 13:49:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:49:33,933 INFO L225 Difference]: With dead ends: 49 [2022-07-14 13:49:33,933 INFO L226 Difference]: Without dead ends: 48 [2022-07-14 13:49:33,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=216, Invalid=972, Unknown=2, NotChecked=0, Total=1190 [2022-07-14 13:49:33,936 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:49:33,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 149 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 100 Invalid, 0 Unknown, 229 Unchecked, 0.1s Time] [2022-07-14 13:49:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-14 13:49:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-07-14 13:49:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-14 13:49:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-14 13:49:33,940 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 71 [2022-07-14 13:49:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:49:33,940 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-14 13:49:33,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 19 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 13:49:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-14 13:49:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-14 13:49:33,941 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:49:33,941 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:49:33,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 13:49:34,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:49:34,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:49:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:49:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 69058943, now seen corresponding path program 6 times [2022-07-14 13:49:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:49:34,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38425141] [2022-07-14 13:49:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:49:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:49:34,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:49:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607273137] [2022-07-14 13:49:34,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 13:49:34,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:49:34,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:49:34,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:49:34,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 13:49:34,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-14 13:49:34,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:49:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 13:49:34,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:49:52,994 WARN L855 $PredicateComparison]: unable to prove that (exists ((fact_~y~0 Int) (fact_~x Int)) (and (< 2 fact_~x) (exists ((v_fact_~x_232 Int) (v_fact_~x_231 Int) (v_fact_~x_230 Int) (v_fact_~y~0_138 Int)) (and (<= v_fact_~x_231 (+ v_fact_~x_230 1)) (<= v_fact_~x_230 3) (<= (+ (* v_fact_~x_232 v_fact_~x_231 v_fact_~x_230) v_fact_~y~0_138) (* v_fact_~x_232 v_fact_~x_231 v_fact_~x_230 v_fact_~x_230)) (<= (+ fact_~y~0 v_fact_~y~0_138) (* fact_~x v_fact_~y~0_138)) (< 2 v_fact_~x_230) (< 1 v_fact_~x_231) (< 1 v_fact_~x_232) (<= fact_~x (+ v_fact_~x_232 2)) (<= v_fact_~x_232 (+ v_fact_~x_231 1)))) (<= |c_fact_#in~x| fact_~x) (<= |c_fact_#res| (* fact_~y~0 fact_~x)))) is different from true [2022-07-14 13:50:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 73 proven. 101 refuted. 0 times theorem prover too weak. 69 trivial. 12 not checked. [2022-07-14 13:50:26,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:50:32,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:50:32,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38425141] [2022-07-14 13:50:32,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:50:32,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607273137] [2022-07-14 13:50:32,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607273137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:50:32,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 13:50:32,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-07-14 13:50:32,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657860065] [2022-07-14 13:50:32,484 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 13:50:32,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 13:50:32,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:50:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 13:50:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=692, Unknown=20, NotChecked=56, Total=930 [2022-07-14 13:50:32,485 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 13:51:43,970 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 64 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 13:52:29,652 WARN L233 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-14 13:52:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:52:29,659 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-07-14 13:52:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 13:52:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 81 [2022-07-14 13:52:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:52:29,660 INFO L225 Difference]: With dead ends: 54 [2022-07-14 13:52:29,660 INFO L226 Difference]: Without dead ends: 53 [2022-07-14 13:52:29,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 172.5s TimeCoverageRelationStatistics Valid=374, Invalid=1757, Unknown=35, NotChecked=90, Total=2256 [2022-07-14 13:52:29,661 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:52:29,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 88 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 267 Unchecked, 0.0s Time] [2022-07-14 13:52:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-14 13:52:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-07-14 13:52:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-14 13:52:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-07-14 13:52:29,666 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2022-07-14 13:52:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:52:29,667 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-07-14 13:52:29,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 21 states have internal predecessors, (47), 4 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-14 13:52:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-07-14 13:52:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-14 13:52:29,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:52:29,668 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:52:29,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 13:52:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-14 13:52:29,872 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:52:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:52:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash 947762722, now seen corresponding path program 7 times [2022-07-14 13:52:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:52:29,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249464521] [2022-07-14 13:52:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:52:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:52:29,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:52:29,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149552254] [2022-07-14 13:52:29,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 13:52:29,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:52:29,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:52:29,894 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) [2022-07-14 13:52:29,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 13:52:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:52:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-14 13:52:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:52:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 23 proven. 182 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-14 13:52:47,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:52:53,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:52:53,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249464521] [2022-07-14 13:52:53,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-14 13:52:53,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149552254] [2022-07-14 13:52:53,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149552254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:52:53,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-14 13:52:53,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-07-14 13:52:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943283782] [2022-07-14 13:52:53,077 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-14 13:52:53,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 13:52:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:52:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 13:52:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1109, Unknown=11, NotChecked=0, Total=1332 [2022-07-14 13:52:53,079 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 31 states, 30 states have (on average 1.6) internal successors, (48), 23 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 13:52:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:52:53,382 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-07-14 13:52:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 13:52:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 23 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 86 [2022-07-14 13:52:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:52:53,384 INFO L225 Difference]: With dead ends: 56 [2022-07-14 13:52:53,384 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 13:52:53,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=248, Invalid=1223, Unknown=11, NotChecked=0, Total=1482 [2022-07-14 13:52:53,385 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:52:53,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 184 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2022-07-14 13:52:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 13:52:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-14 13:52:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2022-07-14 13:52:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-07-14 13:52:53,389 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 86 [2022-07-14 13:52:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:52:53,389 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-07-14 13:52:53,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 23 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-14 13:52:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-07-14 13:52:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-14 13:52:53,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:52:53,391 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:52:53,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-14 13:52:53,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:52:53,599 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-07-14 13:52:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:52:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash 424706436, now seen corresponding path program 8 times [2022-07-14 13:52:53,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:52:53,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732769774] [2022-07-14 13:52:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:52:53,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:52:53,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-14 13:52:53,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526409183] [2022-07-14 13:52:53,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 13:52:53,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:52:53,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:52:53,615 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) [2022-07-14 13:52:53,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 13:52:53,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 13:52:53,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:52:53,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-14 13:52:53,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:53:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 51 proven. 210 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-14 13:53:03,362 INFO L328 TraceCheckSpWp]: Computing backward predicates...