./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/rec_counter3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/rec_counter3.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 d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 22:40:39,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 22:40:39,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 22:40:39,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 22:40:39,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 22:40:39,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 22:40:39,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 22:40:39,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 22:40:39,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 22:40:39,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 22:40:39,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 22:40:39,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 22:40:39,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 22:40:39,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 22:40:39,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 22:40:39,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 22:40:39,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 22:40:39,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 22:40:39,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 22:40:39,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 22:40:39,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 22:40:39,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 22:40:39,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 22:40:39,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 22:40:39,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 22:40:39,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 22:40:39,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 22:40:39,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 22:40:39,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 22:40:39,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 22:40:39,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 22:40:39,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 22:40:39,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 22:40:39,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 22:40:39,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 22:40:39,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 22:40:39,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 22:40:39,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 22:40:39,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 22:40:39,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 22:40:39,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 22:40:39,762 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-14 22:40:39,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 22:40:39,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 22:40:39,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 22:40:39,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 22:40:39,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 22:40:39,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 22:40:39,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 22:40:39,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 22:40:39,784 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 22:40:39,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 22:40:39,784 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 22:40:39,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 22:40:39,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 22:40:39,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 22:40:39,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 22:40:39,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 22:40:39,785 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-14 22:40:39,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 22:40:39,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 22:40:39,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 22:40:39,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 22:40:39,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 22:40:39,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 22:40:39,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:40:39,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 22:40:39,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 22:40:39,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 22:40:39,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 22:40:39,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 22:40:39,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 22:40:39,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 22:40:39,788 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 [2021-12-14 22:40:39,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 22:40:39,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 22:40:39,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 22:40:39,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 22:40:39,980 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 22:40:39,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/rec_counter3.c [2021-12-14 22:40:40,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d240f28/439eee04f70e4d6db660ff1e08d0f347/FLAG75b4b549f [2021-12-14 22:40:40,365 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 22:40:40,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/rec_counter3.c [2021-12-14 22:40:40,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d240f28/439eee04f70e4d6db660ff1e08d0f347/FLAG75b4b549f [2021-12-14 22:40:40,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0d240f28/439eee04f70e4d6db660ff1e08d0f347 [2021-12-14 22:40:40,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 22:40:40,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 22:40:40,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 22:40:40,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 22:40:40,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 22:40:40,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b27c4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40, skipping insertion in model container [2021-12-14 22:40:40,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 22:40:40,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 22:40:40,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:40:40,528 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 22:40:40,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 22:40:40,547 INFO L208 MainTranslator]: Completed translation [2021-12-14 22:40:40,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40 WrapperNode [2021-12-14 22:40:40,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 22:40:40,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 22:40:40,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 22:40:40,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 22:40:40,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,565 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2021-12-14 22:40:40,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 22:40:40,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 22:40:40,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 22:40:40,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 22:40:40,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 22:40:40,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 22:40:40,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 22:40:40,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 22:40:40,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (1/1) ... [2021-12-14 22:40:40,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 22:40:40,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:40,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 22:40:40,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 22:40:40,654 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-12-14 22:40:40,654 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-12-14 22:40:40,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 22:40:40,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 22:40:40,694 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 22:40:40,695 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 22:40:40,768 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 22:40:40,774 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 22:40:40,775 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 22:40:40,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:40:40 BoogieIcfgContainer [2021-12-14 22:40:40,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 22:40:40,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 22:40:40,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 22:40:40,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 22:40:40,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:40:40" (1/3) ... [2021-12-14 22:40:40,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a53a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:40:40, skipping insertion in model container [2021-12-14 22:40:40,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:40:40" (2/3) ... [2021-12-14 22:40:40,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a53a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:40:40, skipping insertion in model container [2021-12-14 22:40:40,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:40:40" (3/3) ... [2021-12-14 22:40:40,783 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_counter3.c [2021-12-14 22:40:40,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 22:40:40,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-12-14 22:40:40,831 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 22:40:40,840 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 22:40:40,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-12-14 22:40:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:40:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 22:40:40,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:40,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:40,865 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:40,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1089293515, now seen corresponding path program 1 times [2021-12-14 22:40:40,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:40,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593966977] [2021-12-14 22:40:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:40,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:41,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:41,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593966977] [2021-12-14 22:40:41,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593966977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:41,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:41,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:40:41,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706065007] [2021-12-14 22:40:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:41,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:41,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:41,063 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 24 states have internal predecessors, (30), 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 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:41,144 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-12-14 22:40:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 22:40:41,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2021-12-14 22:40:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:41,153 INFO L225 Difference]: With dead ends: 45 [2021-12-14 22:40:41,154 INFO L226 Difference]: Without dead ends: 22 [2021-12-14 22:40:41,156 INFO L932 BasicCegarLoop]: 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 [2021-12-14 22:40:41,159 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:41,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-14 22:40:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-14 22:40:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-14 22:40:41,196 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2021-12-14 22:40:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:41,196 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-14 22:40:41,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-14 22:40:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 22:40:41,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:41,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:41,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 22:40:41,198 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash -591639365, now seen corresponding path program 1 times [2021-12-14 22:40:41,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:41,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082901854] [2021-12-14 22:40:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:41,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:41,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:41,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082901854] [2021-12-14 22:40:41,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082901854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:41,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:41,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 22:40:41,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715686575] [2021-12-14 22:40:41,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:41,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:41,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:41,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:41,255 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) 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) [2021-12-14 22:40:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:41,304 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-12-14 22:40:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 22:40:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) 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 [2021-12-14 22:40:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:41,307 INFO L225 Difference]: With dead ends: 42 [2021-12-14 22:40:41,307 INFO L226 Difference]: Without dead ends: 37 [2021-12-14 22:40:41,307 INFO L932 BasicCegarLoop]: 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 [2021-12-14 22:40:41,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:41,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-14 22:40:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-14 22:40:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:40:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-12-14 22:40:41,324 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2021-12-14 22:40:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:41,325 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-12-14 22:40:41,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) 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) [2021-12-14 22:40:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-12-14 22:40:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 22:40:41,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:41,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:41,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 22:40:41,331 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1393066815, now seen corresponding path program 1 times [2021-12-14 22:40:41,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:41,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326577694] [2021-12-14 22:40:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:41,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:41,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:41,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326577694] [2021-12-14 22:40:41,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326577694] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:41,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531535328] [2021-12-14 22:40:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:41,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:41,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:41,403 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:41,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 22:40:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:40:41,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:41,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 22:40:41,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531535328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:41,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:41,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-14 22:40:41,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802299228] [2021-12-14 22:40:41,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:41,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 22:40:41,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 22:40:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-14 22:40:41,555 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:41,614 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-14 22:40:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 22:40:41,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 22:40:41,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:41,616 INFO L225 Difference]: With dead ends: 39 [2021-12-14 22:40:41,616 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 22:40:41,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-14 22:40:41,619 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:41,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 57 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 22:40:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-14 22:40:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:40:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-14 22:40:41,634 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 13 [2021-12-14 22:40:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:41,634 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-14 22:40:41,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 22:40:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-14 22:40:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 22:40:41,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:41,636 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:41,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:41,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:41,853 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1411454171, now seen corresponding path program 1 times [2021-12-14 22:40:41,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165632969] [2021-12-14 22:40:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:41,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 22:40:41,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165632969] [2021-12-14 22:40:41,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165632969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:41,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:41,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 22:40:41,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735174701] [2021-12-14 22:40:41,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:41,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 22:40:41,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 22:40:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 22:40:41,881 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:41,899 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-14 22:40:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 22:40:41,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-14 22:40:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:41,900 INFO L225 Difference]: With dead ends: 48 [2021-12-14 22:40:41,900 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 22:40:41,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:41,901 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:41,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:41,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 22:40:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-12-14 22:40:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 31 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 22:40:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-12-14 22:40:41,914 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 16 [2021-12-14 22:40:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:41,915 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-12-14 22:40:41,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-12-14 22:40:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 22:40:41,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:41,916 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:41,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 22:40:41,916 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1411454226, now seen corresponding path program 1 times [2021-12-14 22:40:41,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:41,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183811768] [2021-12-14 22:40:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:41,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 22:40:41,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:41,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183811768] [2021-12-14 22:40:41,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183811768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:41,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:41,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 22:40:41,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84101327] [2021-12-14 22:40:41,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:41,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 22:40:41,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:41,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 22:40:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:41,946 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:41,956 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-12-14 22:40:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 22:40:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-14 22:40:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:41,957 INFO L225 Difference]: With dead ends: 64 [2021-12-14 22:40:41,957 INFO L226 Difference]: Without dead ends: 42 [2021-12-14 22:40:41,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 22:40:41,958 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:41,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-14 22:40:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-14 22:40:41,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 22:40:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-12-14 22:40:41,963 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 16 [2021-12-14 22:40:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:41,963 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-12-14 22:40:41,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-12-14 22:40:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 22:40:41,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:41,964 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:41,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 22:40:41,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash 805406401, now seen corresponding path program 1 times [2021-12-14 22:40:41,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:41,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62516560] [2021-12-14 22:40:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:41,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 22:40:41,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:41,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62516560] [2021-12-14 22:40:41,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62516560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:41,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:41,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 22:40:41,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569218306] [2021-12-14 22:40:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:41,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 22:40:41,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 22:40:41,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:40:41,984 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:41,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:41,995 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-14 22:40:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 22:40:41,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-14 22:40:41,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:41,996 INFO L225 Difference]: With dead ends: 42 [2021-12-14 22:40:41,996 INFO L226 Difference]: Without dead ends: 37 [2021-12-14 22:40:41,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:40:41,997 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:41,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-14 22:40:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-14 22:40:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 22:40:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-12-14 22:40:42,001 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 17 [2021-12-14 22:40:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:42,001 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-12-14 22:40:42,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-12-14 22:40:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 22:40:42,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:42,002 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:42,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 22:40:42,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:42,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash 719911349, now seen corresponding path program 1 times [2021-12-14 22:40:42,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:42,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517583840] [2021-12-14 22:40:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:42,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 22:40:42,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517583840] [2021-12-14 22:40:42,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517583840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:42,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15751679] [2021-12-14 22:40:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:42,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:42,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:42,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 22:40:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 22:40:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 22:40:42,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 22:40:42,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15751679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:42,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 22:40:42,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2021-12-14 22:40:42,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569487723] [2021-12-14 22:40:42,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:42,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 22:40:42,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:42,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 22:40:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-14 22:40:42,186 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 22:40:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:42,221 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-12-14 22:40:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 22:40:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 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) Word has length 27 [2021-12-14 22:40:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:42,222 INFO L225 Difference]: With dead ends: 37 [2021-12-14 22:40:42,222 INFO L226 Difference]: Without dead ends: 36 [2021-12-14 22:40:42,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-14 22:40:42,223 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:42,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-14 22:40:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-14 22:40:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 22:40:42,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-14 22:40:42,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 27 [2021-12-14 22:40:42,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:42,227 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-14 22:40:42,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 22:40:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-14 22:40:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 22:40:42,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:42,228 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:42,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:42,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-14 22:40:42,441 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:42,442 INFO L85 PathProgramCache]: Analyzing trace with hash 842415392, now seen corresponding path program 1 times [2021-12-14 22:40:42,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951803798] [2021-12-14 22:40:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:42,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 22:40:42,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:42,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951803798] [2021-12-14 22:40:42,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951803798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 22:40:42,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 22:40:42,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 22:40:42,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419341112] [2021-12-14 22:40:42,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 22:40:42,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 22:40:42,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:42,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 22:40:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:40:42,475 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:42,478 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-12-14 22:40:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 22:40:42,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-14 22:40:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:42,479 INFO L225 Difference]: With dead ends: 36 [2021-12-14 22:40:42,480 INFO L226 Difference]: Without dead ends: 35 [2021-12-14 22:40:42,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 22:40:42,480 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:42,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-14 22:40:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-14 22:40:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 22:40:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-14 22:40:42,483 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2021-12-14 22:40:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:42,484 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-14 22:40:42,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-14 22:40:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-14 22:40:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 22:40:42,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:42,485 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:42,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 22:40:42,485 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2107341579, now seen corresponding path program 1 times [2021-12-14 22:40:42,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:42,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408121524] [2021-12-14 22:40:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:42,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 22:40:42,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:42,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408121524] [2021-12-14 22:40:42,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408121524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:42,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883885798] [2021-12-14 22:40:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:42,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:42,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:42,566 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:42,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 22:40:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:42,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 22:40:42,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 22:40:42,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 22:40:42,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883885798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:42,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:42,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-14 22:40:42,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175165138] [2021-12-14 22:40:42,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:42,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 22:40:42,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:42,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 22:40:42,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-14 22:40:42,789 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 22:40:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:42,880 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2021-12-14 22:40:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 22:40:42,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-14 22:40:42,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:42,881 INFO L225 Difference]: With dead ends: 78 [2021-12-14 22:40:42,881 INFO L226 Difference]: Without dead ends: 63 [2021-12-14 22:40:42,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-12-14 22:40:42,884 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:42,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 159 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-14 22:40:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2021-12-14 22:40:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 22:40:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-14 22:40:42,893 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 30 [2021-12-14 22:40:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:42,893 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-14 22:40:42,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 22:40:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-14 22:40:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-14 22:40:42,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:42,895 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:42,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:43,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:43,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:43,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1985419381, now seen corresponding path program 2 times [2021-12-14 22:40:43,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:43,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908362584] [2021-12-14 22:40:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:43,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-14 22:40:43,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:43,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908362584] [2021-12-14 22:40:43,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908362584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:43,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856844003] [2021-12-14 22:40:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:40:43,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:43,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:43,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 22:40:43,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:40:43,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:43,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 22:40:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 41 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 22:40:43,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-14 22:40:43,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856844003] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:43,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:43,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 15 [2021-12-14 22:40:43,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779294749] [2021-12-14 22:40:43,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:43,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 22:40:43,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 22:40:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-12-14 22:40:43,515 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 22:40:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:43,637 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2021-12-14 22:40:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 22:40:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 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) Word has length 58 [2021-12-14 22:40:43,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:43,638 INFO L225 Difference]: With dead ends: 99 [2021-12-14 22:40:43,638 INFO L226 Difference]: Without dead ends: 64 [2021-12-14 22:40:43,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-12-14 22:40:43,639 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:43,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 169 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 22:40:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-14 22:40:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-12-14 22:40:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 22:40:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-14 22:40:43,643 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 58 [2021-12-14 22:40:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:43,643 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-14 22:40:43,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 12 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 22:40:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-14 22:40:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 22:40:43,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:43,645 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:43,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:43,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:43,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:43,860 INFO L85 PathProgramCache]: Analyzing trace with hash -391809979, now seen corresponding path program 3 times [2021-12-14 22:40:43,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:43,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612946589] [2021-12-14 22:40:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:43,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-14 22:40:43,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:43,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612946589] [2021-12-14 22:40:43,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612946589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:43,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872887294] [2021-12-14 22:40:43,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:40:43,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:43,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:43,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 22:40:44,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 22:40:44,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 22:40:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-14 22:40:44,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-12-14 22:40:44,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872887294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:44,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:44,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 24 [2021-12-14 22:40:44,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064677029] [2021-12-14 22:40:44,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:44,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 22:40:44,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 22:40:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-12-14 22:40:44,303 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 22:40:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:44,523 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2021-12-14 22:40:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-14 22:40:44,523 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 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) Word has length 64 [2021-12-14 22:40:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:44,525 INFO L225 Difference]: With dead ends: 115 [2021-12-14 22:40:44,526 INFO L226 Difference]: Without dead ends: 100 [2021-12-14 22:40:44,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1559, Unknown=0, NotChecked=0, Total=2070 [2021-12-14 22:40:44,530 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:44,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 188 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-14 22:40:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2021-12-14 22:40:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 22:40:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-12-14 22:40:44,557 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 64 [2021-12-14 22:40:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:44,557 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-12-14 22:40:44,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 22:40:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-12-14 22:40:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 22:40:44,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:44,564 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:44,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:44,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 22:40:44,765 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash 403858734, now seen corresponding path program 4 times [2021-12-14 22:40:44,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:44,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838431454] [2021-12-14 22:40:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:44,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:44,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:44,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:44,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:45,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-14 22:40:45,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:45,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838431454] [2021-12-14 22:40:45,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838431454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:45,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046438956] [2021-12-14 22:40:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 22:40:45,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:45,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:45,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 22:40:45,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 22:40:45,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 22:40:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 124 proven. 35 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-14 22:40:45,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 124 proven. 35 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-14 22:40:45,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046438956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:45,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:45,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2021-12-14 22:40:45,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076063852] [2021-12-14 22:40:45,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:45,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-14 22:40:45,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-14 22:40:45,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2021-12-14 22:40:45,673 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 41 states, 40 states have (on average 2.225) internal successors, (89), 36 states have internal predecessors, (89), 1 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) [2021-12-14 22:40:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:46,172 INFO L93 Difference]: Finished difference Result 182 states and 215 transitions. [2021-12-14 22:40:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-14 22:40:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.225) internal successors, (89), 36 states have internal predecessors, (89), 1 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) Word has length 93 [2021-12-14 22:40:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:46,176 INFO L225 Difference]: With dead ends: 182 [2021-12-14 22:40:46,176 INFO L226 Difference]: Without dead ends: 161 [2021-12-14 22:40:46,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1694, Invalid=4786, Unknown=0, NotChecked=0, Total=6480 [2021-12-14 22:40:46,178 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 297 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:46,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 166 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:40:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-14 22:40:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2021-12-14 22:40:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 139 states have (on average 1.143884892086331) internal successors, (159), 139 states have internal predecessors, (159), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 7 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 22:40:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-12-14 22:40:46,218 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 93 [2021-12-14 22:40:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:46,219 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-12-14 22:40:46,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.225) internal successors, (89), 36 states have internal predecessors, (89), 1 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) [2021-12-14 22:40:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-12-14 22:40:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 22:40:46,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:46,223 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:46,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:46,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:46,424 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:46,425 INFO L85 PathProgramCache]: Analyzing trace with hash -98398005, now seen corresponding path program 5 times [2021-12-14 22:40:46,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:46,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233252685] [2021-12-14 22:40:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:46,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-12-14 22:40:46,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233252685] [2021-12-14 22:40:46,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233252685] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751326839] [2021-12-14 22:40:46,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 22:40:46,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:46,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:46,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 22:40:46,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-14 22:40:46,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 22:40:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 405 proven. 176 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-14 22:40:47,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 405 proven. 176 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-14 22:40:48,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751326839] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:48,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:48,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 25] total 67 [2021-12-14 22:40:48,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909656523] [2021-12-14 22:40:48,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:48,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-14 22:40:48,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:48,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-14 22:40:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=882, Invalid=3674, Unknown=0, NotChecked=0, Total=4556 [2021-12-14 22:40:48,126 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 62 states have internal predecessors, (133), 1 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) [2021-12-14 22:40:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:49,454 INFO L93 Difference]: Finished difference Result 328 states and 393 transitions. [2021-12-14 22:40:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-12-14 22:40:49,454 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 62 states have internal predecessors, (133), 1 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) Word has length 134 [2021-12-14 22:40:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:49,456 INFO L225 Difference]: With dead ends: 328 [2021-12-14 22:40:49,456 INFO L226 Difference]: Without dead ends: 289 [2021-12-14 22:40:49,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5719 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5158, Invalid=13474, Unknown=0, NotChecked=0, Total=18632 [2021-12-14 22:40:49,461 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 818 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:49,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 189 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:40:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-14 22:40:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 242. [2021-12-14 22:40:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 231 states have (on average 1.155844155844156) internal successors, (267), 231 states have internal predecessors, (267), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 8 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 22:40:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 278 transitions. [2021-12-14 22:40:49,470 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 278 transitions. Word has length 134 [2021-12-14 22:40:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:49,471 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 278 transitions. [2021-12-14 22:40:49,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 62 states have internal predecessors, (133), 1 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) [2021-12-14 22:40:49,471 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 278 transitions. [2021-12-14 22:40:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-14 22:40:49,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:49,473 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:49,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:49,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:49,689 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash 972887003, now seen corresponding path program 6 times [2021-12-14 22:40:49,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:49,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559806916] [2021-12-14 22:40:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:49,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:40:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:49,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2614 backedges. 0 proven. 1638 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-12-14 22:40:50,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:50,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559806916] [2021-12-14 22:40:50,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559806916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:50,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244526430] [2021-12-14 22:40:50,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 22:40:50,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:50,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:50,038 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:50,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 22:40:50,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-14 22:40:50,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:50,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 22:40:50,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2614 backedges. 501 proven. 1110 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-12-14 22:40:50,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2614 backedges. 501 proven. 1110 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2021-12-14 22:40:51,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244526430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:51,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:51,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 46 [2021-12-14 22:40:51,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301567591] [2021-12-14 22:40:51,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:51,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-14 22:40:51,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-14 22:40:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2021-12-14 22:40:51,386 INFO L87 Difference]: Start difference. First operand 242 states and 278 transitions. Second operand has 47 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 37 states have internal predecessors, (116), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-14 22:40:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:52,562 INFO L93 Difference]: Finished difference Result 892 states and 1038 transitions. [2021-12-14 22:40:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-14 22:40:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 37 states have internal predecessors, (116), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 196 [2021-12-14 22:40:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:52,564 INFO L225 Difference]: With dead ends: 892 [2021-12-14 22:40:52,564 INFO L226 Difference]: Without dead ends: 603 [2021-12-14 22:40:52,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8418 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4285, Invalid=14897, Unknown=0, NotChecked=0, Total=19182 [2021-12-14 22:40:52,569 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 407 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:52,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 181 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:40:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-12-14 22:40:52,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 338. [2021-12-14 22:40:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 323 states have (on average 1.173374613003096) internal successors, (379), 323 states have internal predecessors, (379), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-14 22:40:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 394 transitions. [2021-12-14 22:40:52,594 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 394 transitions. Word has length 196 [2021-12-14 22:40:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:52,595 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 394 transitions. [2021-12-14 22:40:52,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.5217391304347827) internal successors, (116), 37 states have internal predecessors, (116), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-14 22:40:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 394 transitions. [2021-12-14 22:40:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-14 22:40:52,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:52,599 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:52,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:52,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 22:40:52,826 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:52,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:52,827 INFO L85 PathProgramCache]: Analyzing trace with hash 140108341, now seen corresponding path program 7 times [2021-12-14 22:40:52,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:52,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870041898] [2021-12-14 22:40:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:52,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:52,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 22:40:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:52,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 3272 proven. 89 refuted. 0 times theorem prover too weak. 3730 trivial. 0 not checked. [2021-12-14 22:40:53,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:53,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870041898] [2021-12-14 22:40:53,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870041898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:53,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409806532] [2021-12-14 22:40:53,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 22:40:53,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:53,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:53,286 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:53,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 22:40:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:53,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 22:40:53,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 2759 proven. 185 refuted. 0 times theorem prover too weak. 4147 trivial. 0 not checked. [2021-12-14 22:40:53,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 2772 proven. 172 refuted. 0 times theorem prover too weak. 4147 trivial. 0 not checked. [2021-12-14 22:40:55,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409806532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:55,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:55,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 31 [2021-12-14 22:40:55,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802898923] [2021-12-14 22:40:55,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:55,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-14 22:40:55,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-14 22:40:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-12-14 22:40:55,458 INFO L87 Difference]: Start difference. First operand 338 states and 394 transitions. Second operand has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 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) [2021-12-14 22:40:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:40:56,122 INFO L93 Difference]: Finished difference Result 755 states and 884 transitions. [2021-12-14 22:40:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-14 22:40:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 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) Word has length 322 [2021-12-14 22:40:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:40:56,124 INFO L225 Difference]: With dead ends: 755 [2021-12-14 22:40:56,124 INFO L226 Difference]: Without dead ends: 456 [2021-12-14 22:40:56,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 658 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=734, Invalid=3556, Unknown=0, NotChecked=0, Total=4290 [2021-12-14 22:40:56,141 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:40:56,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 276 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:40:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-12-14 22:40:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 428. [2021-12-14 22:40:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 407 states have (on average 1.1056511056511056) internal successors, (450), 407 states have internal predecessors, (450), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 18 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-14 22:40:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 471 transitions. [2021-12-14 22:40:56,169 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 471 transitions. Word has length 322 [2021-12-14 22:40:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:40:56,170 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 471 transitions. [2021-12-14 22:40:56,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 27 states have internal predecessors, (83), 1 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) [2021-12-14 22:40:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 471 transitions. [2021-12-14 22:40:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-14 22:40:56,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:40:56,173 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 22:40:56,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 22:40:56,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 22:40:56,395 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:40:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:40:56,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1823617925, now seen corresponding path program 8 times [2021-12-14 22:40:56,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:40:56,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203817209] [2021-12-14 22:40:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:40:56,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:40:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 22:40:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:56,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:57,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:40:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:40:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7488 backedges. 3584 proven. 359 refuted. 0 times theorem prover too weak. 3545 trivial. 0 not checked. [2021-12-14 22:40:57,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:40:57,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203817209] [2021-12-14 22:40:57,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203817209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:40:57,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753050288] [2021-12-14 22:40:57,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:40:57,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:40:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:40:57,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:40:57,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 22:40:57,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:40:57,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:40:57,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 22:40:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:40:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7488 backedges. 3617 proven. 324 refuted. 0 times theorem prover too weak. 3547 trivial. 0 not checked. [2021-12-14 22:40:57,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:40:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7488 backedges. 3636 proven. 305 refuted. 0 times theorem prover too weak. 3547 trivial. 0 not checked. [2021-12-14 22:40:59,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753050288] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:40:59,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:40:59,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 29] total 35 [2021-12-14 22:40:59,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065953284] [2021-12-14 22:40:59,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:40:59,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 22:40:59,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:40:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 22:40:59,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 22:40:59,728 INFO L87 Difference]: Start difference. First operand 428 states and 471 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 28 states have internal predecessors, (90), 1 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) [2021-12-14 22:41:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:00,530 INFO L93 Difference]: Finished difference Result 682 states and 756 transitions. [2021-12-14 22:41:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-14 22:41:00,530 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 28 states have internal predecessors, (90), 1 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) Word has length 328 [2021-12-14 22:41:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:00,532 INFO L225 Difference]: With dead ends: 682 [2021-12-14 22:41:00,532 INFO L226 Difference]: Without dead ends: 452 [2021-12-14 22:41:00,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 680 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=925, Invalid=4927, Unknown=0, NotChecked=0, Total=5852 [2021-12-14 22:41:00,534 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:00,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 409 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:41:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-12-14 22:41:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 431. [2021-12-14 22:41:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 410 states have (on average 1.0951219512195123) internal successors, (449), 410 states have internal predecessors, (449), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 18 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-14 22:41:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 470 transitions. [2021-12-14 22:41:00,554 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 470 transitions. Word has length 328 [2021-12-14 22:41:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:00,554 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 470 transitions. [2021-12-14 22:41:00,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 28 states have internal predecessors, (90), 1 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) [2021-12-14 22:41:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 470 transitions. [2021-12-14 22:41:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-14 22:41:00,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:00,558 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:00,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:00,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 22:41:00,774 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:00,775 INFO L85 PathProgramCache]: Analyzing trace with hash 99125038, now seen corresponding path program 9 times [2021-12-14 22:41:00,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:00,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695415229] [2021-12-14 22:41:00,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:00,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:00,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:41:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7572 backedges. 4691 proven. 251 refuted. 0 times theorem prover too weak. 2630 trivial. 0 not checked. [2021-12-14 22:41:01,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695415229] [2021-12-14 22:41:01,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695415229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:01,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748770975] [2021-12-14 22:41:01,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:41:01,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:01,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:01,312 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:41:01,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 22:41:01,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-14 22:41:01,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:01,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-14 22:41:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7572 backedges. 3565 proven. 585 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-12-14 22:41:02,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7572 backedges. 3565 proven. 585 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2021-12-14 22:41:03,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748770975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:03,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:03,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20, 20] total 71 [2021-12-14 22:41:03,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136231038] [2021-12-14 22:41:03,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:03,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-14 22:41:03,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-14 22:41:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=4418, Unknown=0, NotChecked=0, Total=4970 [2021-12-14 22:41:03,300 INFO L87 Difference]: Start difference. First operand 431 states and 470 transitions. Second operand has 71 states, 71 states have (on average 1.943661971830986) internal successors, (138), 68 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 22:41:06,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:06,550 INFO L93 Difference]: Finished difference Result 1966 states and 2250 transitions. [2021-12-14 22:41:06,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-14 22:41:06,550 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.943661971830986) internal successors, (138), 68 states have internal predecessors, (138), 1 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) Word has length 321 [2021-12-14 22:41:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:06,555 INFO L225 Difference]: With dead ends: 1966 [2021-12-14 22:41:06,555 INFO L226 Difference]: Without dead ends: 1577 [2021-12-14 22:41:06,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 628 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9451 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4819, Invalid=29963, Unknown=0, NotChecked=0, Total=34782 [2021-12-14 22:41:06,560 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1002 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:06,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1002 Valid, 538 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 22:41:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-12-14 22:41:06,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 695. [2021-12-14 22:41:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 668 states have (on average 1.0853293413173652) internal successors, (725), 668 states have internal predecessors, (725), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-12-14 22:41:06,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 752 transitions. [2021-12-14 22:41:06,590 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 752 transitions. Word has length 321 [2021-12-14 22:41:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:06,591 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 752 transitions. [2021-12-14 22:41:06,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.943661971830986) internal successors, (138), 68 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-14 22:41:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 752 transitions. [2021-12-14 22:41:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-12-14 22:41:06,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:06,594 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:06,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:06,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 22:41:06,812 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash 643752155, now seen corresponding path program 10 times [2021-12-14 22:41:06,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:06,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942612338] [2021-12-14 22:41:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:06,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:06,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 22:41:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9653 backedges. 4434 proven. 3267 refuted. 0 times theorem prover too weak. 1952 trivial. 0 not checked. [2021-12-14 22:41:07,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942612338] [2021-12-14 22:41:07,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942612338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:07,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517450202] [2021-12-14 22:41:07,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 22:41:07,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:07,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:07,836 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:41:07,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 22:41:07,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 22:41:07,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:08,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-14 22:41:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9653 backedges. 4461 proven. 3240 refuted. 0 times theorem prover too weak. 1952 trivial. 0 not checked. [2021-12-14 22:41:08,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9653 backedges. 4461 proven. 3240 refuted. 0 times theorem prover too weak. 1952 trivial. 0 not checked. [2021-12-14 22:41:12,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517450202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:12,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:12,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 53 [2021-12-14 22:41:12,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271986526] [2021-12-14 22:41:12,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:12,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-14 22:41:12,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-14 22:41:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2434, Unknown=0, NotChecked=0, Total=2756 [2021-12-14 22:41:12,159 INFO L87 Difference]: Start difference. First operand 695 states and 752 transitions. Second operand has 53 states, 53 states have (on average 2.339622641509434) internal successors, (124), 43 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 22:41:13,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:13,364 INFO L93 Difference]: Finished difference Result 1183 states and 1285 transitions. [2021-12-14 22:41:13,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-14 22:41:13,364 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.339622641509434) internal successors, (124), 43 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) Word has length 358 [2021-12-14 22:41:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:13,366 INFO L225 Difference]: With dead ends: 1183 [2021-12-14 22:41:13,366 INFO L226 Difference]: Without dead ends: 560 [2021-12-14 22:41:13,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9698 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4046, Invalid=19210, Unknown=0, NotChecked=0, Total=23256 [2021-12-14 22:41:13,371 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 410 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:13,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 233 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 22:41:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-14 22:41:13,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 524. [2021-12-14 22:41:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 504 states have (on average 1.0734126984126984) internal successors, (541), 504 states have internal predecessors, (541), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-14 22:41:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 561 transitions. [2021-12-14 22:41:13,392 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 561 transitions. Word has length 358 [2021-12-14 22:41:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:13,393 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 561 transitions. [2021-12-14 22:41:13,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.339622641509434) internal successors, (124), 43 states have internal predecessors, (124), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-14 22:41:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 561 transitions. [2021-12-14 22:41:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-12-14 22:41:13,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:13,395 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:13,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:13,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-14 22:41:13,611 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:13,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash 7181636, now seen corresponding path program 11 times [2021-12-14 22:41:13,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:13,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789117798] [2021-12-14 22:41:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:13,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:13,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:41:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:13,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:13,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:13,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11179 backedges. 5754 proven. 559 refuted. 0 times theorem prover too weak. 4866 trivial. 0 not checked. [2021-12-14 22:41:14,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:14,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789117798] [2021-12-14 22:41:14,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789117798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:14,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424978543] [2021-12-14 22:41:14,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 22:41:14,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:14,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:14,368 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:41:14,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 22:41:14,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-12-14 22:41:14,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:14,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-14 22:41:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11179 backedges. 5738 proven. 188 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-14 22:41:15,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11179 backedges. 5754 proven. 172 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2021-12-14 22:41:16,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424978543] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:16,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:16,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 29, 29] total 60 [2021-12-14 22:41:16,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184194511] [2021-12-14 22:41:16,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:16,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-14 22:41:16,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:16,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-14 22:41:16,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=3233, Unknown=0, NotChecked=0, Total=3540 [2021-12-14 22:41:16,399 INFO L87 Difference]: Start difference. First operand 524 states and 561 transitions. Second operand has 60 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 52 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 22:41:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:17,939 INFO L93 Difference]: Finished difference Result 760 states and 824 transitions. [2021-12-14 22:41:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-14 22:41:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 52 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 377 [2021-12-14 22:41:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:17,941 INFO L225 Difference]: With dead ends: 760 [2021-12-14 22:41:17,941 INFO L226 Difference]: Without dead ends: 407 [2021-12-14 22:41:17,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 759 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2592, Invalid=14700, Unknown=0, NotChecked=0, Total=17292 [2021-12-14 22:41:17,957 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 136 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:17,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 601 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:41:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-12-14 22:41:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2021-12-14 22:41:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 391 states have (on average 1.0716112531969308) internal successors, (419), 391 states have internal predecessors, (419), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 13 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-14 22:41:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 435 transitions. [2021-12-14 22:41:17,986 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 435 transitions. Word has length 377 [2021-12-14 22:41:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:17,986 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 435 transitions. [2021-12-14 22:41:17,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 52 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-14 22:41:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 435 transitions. [2021-12-14 22:41:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-12-14 22:41:17,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:17,998 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 15, 14, 14, 14, 14, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:18,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:18,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:18,216 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:18,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1895808066, now seen corresponding path program 12 times [2021-12-14 22:41:18,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:18,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325600417] [2021-12-14 22:41:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:18,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 22:41:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:19,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11815 backedges. 7691 proven. 1160 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2021-12-14 22:41:19,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:19,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325600417] [2021-12-14 22:41:19,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325600417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:19,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351754973] [2021-12-14 22:41:19,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 22:41:19,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:19,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:19,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:41:19,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 22:41:19,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-12-14 22:41:19,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:19,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 22:41:19,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11815 backedges. 5622 proven. 2141 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2021-12-14 22:41:20,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11815 backedges. 5622 proven. 2141 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2021-12-14 22:41:21,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351754973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:21,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:21,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 25, 25] total 96 [2021-12-14 22:41:21,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038818948] [2021-12-14 22:41:21,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:21,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-14 22:41:21,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:21,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-14 22:41:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=8287, Unknown=0, NotChecked=0, Total=9120 [2021-12-14 22:41:21,450 INFO L87 Difference]: Start difference. First operand 407 states and 435 transitions. Second operand has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 82 states have internal predecessors, (208), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-14 22:41:29,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:29,061 INFO L93 Difference]: Finished difference Result 969 states and 1072 transitions. [2021-12-14 22:41:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2021-12-14 22:41:29,061 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 82 states have internal predecessors, (208), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 393 [2021-12-14 22:41:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:29,063 INFO L225 Difference]: With dead ends: 969 [2021-12-14 22:41:29,063 INFO L226 Difference]: Without dead ends: 625 [2021-12-14 22:41:29,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1115 GetRequests, 764 SyntacticMatches, 0 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41091 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=19149, Invalid=105107, Unknown=0, NotChecked=0, Total=124256 [2021-12-14 22:41:29,071 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 916 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:29,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 681 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 22:41:29,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-14 22:41:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 503. [2021-12-14 22:41:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 485 states have (on average 1.0762886597938144) internal successors, (522), 485 states have internal predecessors, (522), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 15 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 22:41:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 540 transitions. [2021-12-14 22:41:29,091 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 540 transitions. Word has length 393 [2021-12-14 22:41:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:29,092 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 540 transitions. [2021-12-14 22:41:29,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1666666666666665) internal successors, (208), 82 states have internal predecessors, (208), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-12-14 22:41:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 540 transitions. [2021-12-14 22:41:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-12-14 22:41:29,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:29,095 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:29,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:29,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:29,309 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash -356037717, now seen corresponding path program 13 times [2021-12-14 22:41:29,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:29,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639235829] [2021-12-14 22:41:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:29,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:29,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 22:41:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:29,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:29,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:29,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:29,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20885 backedges. 13438 proven. 1579 refuted. 0 times theorem prover too weak. 5868 trivial. 0 not checked. [2021-12-14 22:41:30,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639235829] [2021-12-14 22:41:30,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639235829] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100592430] [2021-12-14 22:41:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 22:41:30,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:30,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:30,500 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:41:30,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 22:41:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:30,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-14 22:41:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20885 backedges. 13495 proven. 1520 refuted. 0 times theorem prover too weak. 5870 trivial. 0 not checked. [2021-12-14 22:41:31,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20885 backedges. 13548 proven. 1467 refuted. 0 times theorem prover too weak. 5870 trivial. 0 not checked. [2021-12-14 22:41:35,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100592430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:35,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:35,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 49, 49] total 55 [2021-12-14 22:41:35,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192150129] [2021-12-14 22:41:35,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:35,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-14 22:41:35,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-14 22:41:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=2646, Unknown=0, NotChecked=0, Total=2970 [2021-12-14 22:41:35,340 INFO L87 Difference]: Start difference. First operand 503 states and 540 transitions. Second operand has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 22:41:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:37,285 INFO L93 Difference]: Finished difference Result 769 states and 842 transitions. [2021-12-14 22:41:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-12-14 22:41:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 492 [2021-12-14 22:41:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:37,287 INFO L225 Difference]: With dead ends: 769 [2021-12-14 22:41:37,288 INFO L226 Difference]: Without dead ends: 506 [2021-12-14 22:41:37,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 1013 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5899 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4089, Invalid=21351, Unknown=0, NotChecked=0, Total=25440 [2021-12-14 22:41:37,292 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:37,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 806 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 22:41:37,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-12-14 22:41:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-12-14 22:41:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 488 states have (on average 1.069672131147541) internal successors, (522), 488 states have internal predecessors, (522), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 15 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 22:41:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 540 transitions. [2021-12-14 22:41:37,314 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 540 transitions. Word has length 492 [2021-12-14 22:41:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:37,314 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 540 transitions. [2021-12-14 22:41:37,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 44 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-14 22:41:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 540 transitions. [2021-12-14 22:41:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-12-14 22:41:37,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:37,318 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 17, 16, 16, 16, 16, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:37,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:37,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:37,536 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:37,536 INFO L85 PathProgramCache]: Analyzing trace with hash 237207140, now seen corresponding path program 14 times [2021-12-14 22:41:37,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:37,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406171516] [2021-12-14 22:41:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:37,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:37,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 22:41:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:37,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 21381 backedges. 10119 proven. 6875 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2021-12-14 22:41:38,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406171516] [2021-12-14 22:41:38,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406171516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656255730] [2021-12-14 22:41:38,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 22:41:38,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:38,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:38,862 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:41:38,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 22:41:39,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 22:41:39,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 22:41:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-14 22:41:39,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 22:41:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21381 backedges. 10152 proven. 6842 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2021-12-14 22:41:39,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 22:41:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21381 backedges. 10152 proven. 6842 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2021-12-14 22:41:44,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656255730] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 22:41:44,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 22:41:44,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 63 [2021-12-14 22:41:44,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881082985] [2021-12-14 22:41:44,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 22:41:44,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-14 22:41:44,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 22:41:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-14 22:41:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=3461, Unknown=0, NotChecked=0, Total=3906 [2021-12-14 22:41:44,656 INFO L87 Difference]: Start difference. First operand 506 states and 540 transitions. Second operand has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 51 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-14 22:41:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 22:41:45,891 INFO L93 Difference]: Finished difference Result 811 states and 880 transitions. [2021-12-14 22:41:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-12-14 22:41:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 51 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 505 [2021-12-14 22:41:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 22:41:45,893 INFO L225 Difference]: With dead ends: 811 [2021-12-14 22:41:45,893 INFO L226 Difference]: Without dead ends: 545 [2021-12-14 22:41:45,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1253 GetRequests, 1048 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19097 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=7627, Invalid=35015, Unknown=0, NotChecked=0, Total=42642 [2021-12-14 22:41:45,899 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 410 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 22:41:45,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 251 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 22:41:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-12-14 22:41:45,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-12-14 22:41:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 526 states have (on average 1.064638783269962) internal successors, (560), 526 states have internal predecessors, (560), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-14 22:41:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 579 transitions. [2021-12-14 22:41:45,921 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 579 transitions. Word has length 505 [2021-12-14 22:41:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 22:41:45,921 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 579 transitions. [2021-12-14 22:41:45,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 51 states have internal predecessors, (146), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-14 22:41:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 579 transitions. [2021-12-14 22:41:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-12-14 22:41:45,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 22:41:45,925 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 18, 17, 17, 17, 17, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-12-14 22:41:45,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 22:41:46,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-14 22:41:46,145 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-14 22:41:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 22:41:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash 259538881, now seen corresponding path program 15 times [2021-12-14 22:41:46,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 22:41:46,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513869925] [2021-12-14 22:41:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 22:41:46,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 22:41:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:46,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 22:41:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:46,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:46,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:46,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 22:41:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 22:41:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25303 backedges. 16970 proven. 2089 refuted. 0 times theorem prover too weak. 6244 trivial. 0 not checked. [2021-12-14 22:41:47,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 22:41:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513869925] [2021-12-14 22:41:47,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513869925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 22:41:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038673017] [2021-12-14 22:41:47,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 22:41:47,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 22:41:47,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 22:41:47,716 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 22:41:47,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process