./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Binomial.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version ff03de63 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/Binomial.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 c204b56aba09d3ce87e17edffdff1d33aa0b4dc87a1e1140339548dffa982588 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 20:46:33,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 20:46:33,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 20:46:33,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 20:46:33,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 20:46:33,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 20:46:33,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 20:46:33,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 20:46:33,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 20:46:33,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 20:46:33,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 20:46:33,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 20:46:33,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 20:46:33,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 20:46:33,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 20:46:33,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 20:46:33,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 20:46:33,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 20:46:33,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 20:46:33,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 20:46:33,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 20:46:33,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 20:46:33,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 20:46:33,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 20:46:33,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 20:46:33,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 20:46:33,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 20:46:33,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 20:46:33,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 20:46:33,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 20:46:33,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 20:46:33,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 20:46:33,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 20:46:33,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 20:46:33,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 20:46:33,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 20:46:33,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 20:46:33,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 20:46:33,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 20:46:33,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 20:46:33,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 20:46:33,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-21 20:46:33,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 20:46:33,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 20:46:33,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 20:46:33,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 20:46:33,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 20:46:33,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 20:46:33,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 20:46:33,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 20:46:33,610 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 20:46:33,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 20:46:33,611 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 20:46:33,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 20:46:33,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 20:46:33,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 20:46:33,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 20:46:33,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 20:46:33,611 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-21 20:46:33,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 20:46:33,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 20:46:33,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 20:46:33,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 20:46:33,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 20:46:33,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 20:46:33,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:46:33,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 20:46:33,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 20:46:33,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 20:46:33,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 20:46:33,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 20:46:33,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 20:46:33,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 20:46:33,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c204b56aba09d3ce87e17edffdff1d33aa0b4dc87a1e1140339548dffa982588 [2021-12-21 20:46:33,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 20:46:33,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 20:46:33,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 20:46:33,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 20:46:33,817 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 20:46:33,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Binomial.c [2021-12-21 20:46:33,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a6a1496/0b7848a6f92f4fd98fc82565c2898ec9/FLAGc405e6940 [2021-12-21 20:46:34,157 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 20:46:34,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Binomial.c [2021-12-21 20:46:34,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a6a1496/0b7848a6f92f4fd98fc82565c2898ec9/FLAGc405e6940 [2021-12-21 20:46:34,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a6a1496/0b7848a6f92f4fd98fc82565c2898ec9 [2021-12-21 20:46:34,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 20:46:34,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 20:46:34,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 20:46:34,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 20:46:34,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 20:46:34,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@810462a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34, skipping insertion in model container [2021-12-21 20:46:34,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 20:46:34,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 20:46:34,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:46:34,736 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 20:46:34,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:46:34,753 INFO L208 MainTranslator]: Completed translation [2021-12-21 20:46:34,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34 WrapperNode [2021-12-21 20:46:34,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 20:46:34,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 20:46:34,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 20:46:34,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 20:46:34,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,771 INFO L137 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2021-12-21 20:46:34,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 20:46:34,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 20:46:34,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 20:46:34,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 20:46:34,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 20:46:34,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 20:46:34,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 20:46:34,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 20:46:34,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (1/1) ... [2021-12-21 20:46:34,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:46:34,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:34,829 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) [2021-12-21 20:46:34,832 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 [2021-12-21 20:46:34,854 INFO L130 BoogieDeclarations]: Found specification of procedure fact [2021-12-21 20:46:34,866 INFO L138 BoogieDeclarations]: Found implementation of procedure fact [2021-12-21 20:46:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure binomialCoefficient [2021-12-21 20:46:34,866 INFO L138 BoogieDeclarations]: Found implementation of procedure binomialCoefficient [2021-12-21 20:46:34,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 20:46:34,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 20:46:34,901 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 20:46:34,902 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 20:46:35,037 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 20:46:35,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 20:46:35,042 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 20:46:35,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:46:35 BoogieIcfgContainer [2021-12-21 20:46:35,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 20:46:35,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 20:46:35,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 20:46:35,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 20:46:35,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 08:46:34" (1/3) ... [2021-12-21 20:46:35,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b4224b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:46:35, skipping insertion in model container [2021-12-21 20:46:35,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:46:34" (2/3) ... [2021-12-21 20:46:35,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b4224b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:46:35, skipping insertion in model container [2021-12-21 20:46:35,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:46:35" (3/3) ... [2021-12-21 20:46:35,049 INFO L111 eAbstractionObserver]: Analyzing ICFG Binomial.c [2021-12-21 20:46:35,065 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 20:46:35,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-12-21 20:46:35,117 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 20:46:35,133 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 [2021-12-21 20:46:35,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-12-21 20:46:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 50 states have internal predecessors, (58), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 20:46:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 20:46:35,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:35,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:35,166 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:35,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1446708258, now seen corresponding path program 1 times [2021-12-21 20:46:35,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:35,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538949554] [2021-12-21 20:46:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:35,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:46:35,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538949554] [2021-12-21 20:46:35,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538949554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:35,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:35,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:46:35,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368523064] [2021-12-21 20:46:35,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:35,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 20:46:35,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 20:46:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 20:46:35,328 INFO L87 Difference]: Start difference. First operand has 59 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 50 states have internal predecessors, (58), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:46:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:35,353 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2021-12-21 20:46:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 20:46:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 20:46:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:35,362 INFO L225 Difference]: With dead ends: 114 [2021-12-21 20:46:35,363 INFO L226 Difference]: Without dead ends: 56 [2021-12-21 20:46:35,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 20:46:35,371 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:35,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-21 20:46:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-21 20:46:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.5) internal successors, (51), 47 states have internal predecessors, (51), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 20:46:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-12-21 20:46:35,413 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 8 [2021-12-21 20:46:35,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:35,413 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-12-21 20:46:35,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:46:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-12-21 20:46:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 20:46:35,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:35,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:35,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 20:46:35,416 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1446689999, now seen corresponding path program 1 times [2021-12-21 20:46:35,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:35,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179538763] [2021-12-21 20:46:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:35,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:46:35,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:35,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179538763] [2021-12-21 20:46:35,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179538763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:35,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:35,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:46:35,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529142694] [2021-12-21 20:46:35,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:35,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:46:35,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:46:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:46:35,497 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:46:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:35,541 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2021-12-21 20:46:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 20:46:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 20:46:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:35,543 INFO L225 Difference]: With dead ends: 109 [2021-12-21 20:46:35,543 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 20:46:35,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:46:35,544 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:35,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 145 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 20:46:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-21 20:46:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 48 states have internal predecessors, (52), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 20:46:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-12-21 20:46:35,551 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 8 [2021-12-21 20:46:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:35,551 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-12-21 20:46:35,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:46:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-12-21 20:46:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 20:46:35,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:35,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:35,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 20:46:35,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:35,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1304665248, now seen corresponding path program 1 times [2021-12-21 20:46:35,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:35,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611632894] [2021-12-21 20:46:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:35,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:46:35,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:35,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611632894] [2021-12-21 20:46:35,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611632894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:35,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:35,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 20:46:35,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380169527] [2021-12-21 20:46:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:35,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 20:46:35,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:35,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 20:46:35,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 20:46:35,629 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:46:35,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:35,756 INFO L93 Difference]: Finished difference Result 155 states and 182 transitions. [2021-12-21 20:46:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:46:35,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 20:46:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:35,759 INFO L225 Difference]: With dead ends: 155 [2021-12-21 20:46:35,759 INFO L226 Difference]: Without dead ends: 102 [2021-12-21 20:46:35,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:46:35,760 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 52 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:35,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 352 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-21 20:46:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2021-12-21 20:46:35,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.4655172413793103) internal successors, (85), 71 states have internal predecessors, (85), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-21 20:46:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2021-12-21 20:46:35,773 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 13 [2021-12-21 20:46:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:35,773 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2021-12-21 20:46:35,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:46:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2021-12-21 20:46:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 20:46:35,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:35,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:35,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 20:46:35,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash 616970978, now seen corresponding path program 1 times [2021-12-21 20:46:35,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:35,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706155857] [2021-12-21 20:46:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:35,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:46:35,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:35,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706155857] [2021-12-21 20:46:35,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706155857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:35,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:35,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:46:35,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125229697] [2021-12-21 20:46:35,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:35,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:46:35,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:46:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:46:35,808 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:46:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:35,865 INFO L93 Difference]: Finished difference Result 186 states and 225 transitions. [2021-12-21 20:46:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:46:35,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 20:46:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:35,867 INFO L225 Difference]: With dead ends: 186 [2021-12-21 20:46:35,867 INFO L226 Difference]: Without dead ends: 105 [2021-12-21 20:46:35,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:46:35,869 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 34 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:35,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 168 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-21 20:46:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2021-12-21 20:46:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 72 states have internal predecessors, (86), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-21 20:46:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2021-12-21 20:46:35,878 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 13 [2021-12-21 20:46:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:35,879 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2021-12-21 20:46:35,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:46:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2021-12-21 20:46:35,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 20:46:35,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:35,880 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:35,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 20:46:35,880 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:35,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1503380349, now seen corresponding path program 1 times [2021-12-21 20:46:35,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:35,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285396939] [2021-12-21 20:46:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:35,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:35,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 20:46:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:46:35,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:35,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285396939] [2021-12-21 20:46:35,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285396939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:35,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:35,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 20:46:35,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024230533] [2021-12-21 20:46:35,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:35,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 20:46:35,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 20:46:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 20:46:35,947 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:46:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:36,023 INFO L93 Difference]: Finished difference Result 226 states and 294 transitions. [2021-12-21 20:46:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:46:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-21 20:46:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:36,025 INFO L225 Difference]: With dead ends: 226 [2021-12-21 20:46:36,025 INFO L226 Difference]: Without dead ends: 145 [2021-12-21 20:46:36,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:46:36,026 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 43 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:36,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 333 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-21 20:46:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2021-12-21 20:46:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 85 states have (on average 1.4705882352941178) internal successors, (125), 100 states have internal predecessors, (125), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-21 20:46:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 163 transitions. [2021-12-21 20:46:36,036 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 163 transitions. Word has length 19 [2021-12-21 20:46:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:36,037 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 163 transitions. [2021-12-21 20:46:36,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:46:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 163 transitions. [2021-12-21 20:46:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 20:46:36,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:36,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:36,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 20:46:36,037 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting binomialCoefficientErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:36,038 INFO L85 PathProgramCache]: Analyzing trace with hash -715516421, now seen corresponding path program 1 times [2021-12-21 20:46:36,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:36,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692168879] [2021-12-21 20:46:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:36,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 20:46:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 20:46:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 20:46:36,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692168879] [2021-12-21 20:46:36,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692168879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:36,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:36,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 20:46:36,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645873854] [2021-12-21 20:46:36,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:36,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 20:46:36,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 20:46:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:46:36,089 INFO L87 Difference]: Start difference. First operand 125 states and 163 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 20:46:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:36,143 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2021-12-21 20:46:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:46:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-21 20:46:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:36,144 INFO L225 Difference]: With dead ends: 149 [2021-12-21 20:46:36,144 INFO L226 Difference]: Without dead ends: 148 [2021-12-21 20:46:36,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:46:36,145 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 63 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:36,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 277 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:36,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-21 20:46:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 125. [2021-12-21 20:46:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 85 states have (on average 1.4588235294117646) internal successors, (124), 100 states have internal predecessors, (124), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-21 20:46:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2021-12-21 20:46:36,154 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 22 [2021-12-21 20:46:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:36,154 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2021-12-21 20:46:36,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 20:46:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2021-12-21 20:46:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 20:46:36,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:36,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:36,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 20:46:36,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting binomialCoefficientErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:36,155 INFO L85 PathProgramCache]: Analyzing trace with hash -706172517, now seen corresponding path program 1 times [2021-12-21 20:46:36,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:36,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177124911] [2021-12-21 20:46:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:36,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 20:46:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 20:46:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 20:46:36,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:36,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177124911] [2021-12-21 20:46:36,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177124911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:36,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:36,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 20:46:36,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100890820] [2021-12-21 20:46:36,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:36,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 20:46:36,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 20:46:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:46:36,193 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 20:46:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:36,246 INFO L93 Difference]: Finished difference Result 163 states and 200 transitions. [2021-12-21 20:46:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:46:36,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-12-21 20:46:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:36,248 INFO L225 Difference]: With dead ends: 163 [2021-12-21 20:46:36,248 INFO L226 Difference]: Without dead ends: 162 [2021-12-21 20:46:36,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:46:36,249 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 61 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:36,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 264 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:36,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-21 20:46:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 140. [2021-12-21 20:46:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 96 states have (on average 1.4270833333333333) internal successors, (137), 111 states have internal predecessors, (137), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-21 20:46:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 181 transitions. [2021-12-21 20:46:36,260 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 181 transitions. Word has length 23 [2021-12-21 20:46:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:36,261 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 181 transitions. [2021-12-21 20:46:36,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 20:46:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 181 transitions. [2021-12-21 20:46:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 20:46:36,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:36,261 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:36,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 20:46:36,261 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:36,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:36,262 INFO L85 PathProgramCache]: Analyzing trace with hash -131105574, now seen corresponding path program 1 times [2021-12-21 20:46:36,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:36,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010956671] [2021-12-21 20:46:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:36,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 20:46:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 20:46:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 20:46:36,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:36,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010956671] [2021-12-21 20:46:36,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010956671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:36,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:36,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 20:46:36,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780693288] [2021-12-21 20:46:36,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:36,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 20:46:36,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:36,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 20:46:36,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:46:36,341 INFO L87 Difference]: Start difference. First operand 140 states and 181 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 20:46:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:36,444 INFO L93 Difference]: Finished difference Result 292 states and 376 transitions. [2021-12-21 20:46:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 20:46:36,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-12-21 20:46:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:36,446 INFO L225 Difference]: With dead ends: 292 [2021-12-21 20:46:36,446 INFO L226 Difference]: Without dead ends: 168 [2021-12-21 20:46:36,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 20:46:36,448 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 64 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:36,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 375 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-21 20:46:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 144. [2021-12-21 20:46:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 99 states have (on average 1.4141414141414141) internal successors, (140), 114 states have internal predecessors, (140), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-21 20:46:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 184 transitions. [2021-12-21 20:46:36,457 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 184 transitions. Word has length 27 [2021-12-21 20:46:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:36,457 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 184 transitions. [2021-12-21 20:46:36,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 20:46:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 184 transitions. [2021-12-21 20:46:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 20:46:36,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:36,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:36,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 20:46:36,459 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting binomialCoefficientErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:36,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1641411648, now seen corresponding path program 1 times [2021-12-21 20:46:36,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:36,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365904088] [2021-12-21 20:46:36,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:36,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:36,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:36,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32577904] [2021-12-21 20:46:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:36,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:36,484 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) [2021-12-21 20:46:36,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 20:46:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:36,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 20:46:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 20:46:36,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:36,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:36,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365904088] [2021-12-21 20:46:36,694 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:36,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32577904] [2021-12-21 20:46:36,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32577904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:36,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:36,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:46:36,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603690346] [2021-12-21 20:46:36,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:36,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:46:36,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:36,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:46:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:46:36,696 INFO L87 Difference]: Start difference. First operand 144 states and 184 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 20:46:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:36,743 INFO L93 Difference]: Finished difference Result 203 states and 281 transitions. [2021-12-21 20:46:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:46:36,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-21 20:46:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:36,745 INFO L225 Difference]: With dead ends: 203 [2021-12-21 20:46:36,745 INFO L226 Difference]: Without dead ends: 201 [2021-12-21 20:46:36,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:46:36,746 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:36,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 211 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-12-21 20:46:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 170. [2021-12-21 20:46:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 121 states have (on average 1.3553719008264462) internal successors, (164), 133 states have internal predecessors, (164), 25 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (39), 27 states have call predecessors, (39), 25 states have call successors, (39) [2021-12-21 20:46:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 228 transitions. [2021-12-21 20:46:36,755 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 228 transitions. Word has length 30 [2021-12-21 20:46:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:36,756 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 228 transitions. [2021-12-21 20:46:36,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 20:46:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 228 transitions. [2021-12-21 20:46:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 20:46:36,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:36,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:36,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:36,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:36,977 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting binomialCoefficientErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:36,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:36,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1143594174, now seen corresponding path program 1 times [2021-12-21 20:46:36,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:36,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218658232] [2021-12-21 20:46:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:36,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:36,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:36,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105152774] [2021-12-21 20:46:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:36,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:36,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:36,989 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) [2021-12-21 20:46:36,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 20:46:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 20:46:37,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 20:46:37,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:37,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218658232] [2021-12-21 20:46:37,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105152774] [2021-12-21 20:46:37,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105152774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:46:37,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:46:37,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-12-21 20:46:37,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696566534] [2021-12-21 20:46:37,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:37,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 20:46:37,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:37,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 20:46:37,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:46:37,506 INFO L87 Difference]: Start difference. First operand 170 states and 228 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 20:46:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:37,557 INFO L93 Difference]: Finished difference Result 257 states and 355 transitions. [2021-12-21 20:46:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 20:46:37,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-12-21 20:46:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:37,560 INFO L225 Difference]: With dead ends: 257 [2021-12-21 20:46:37,560 INFO L226 Difference]: Without dead ends: 255 [2021-12-21 20:46:37,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:46:37,561 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 43 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:37,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 179 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-21 20:46:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 205. [2021-12-21 20:46:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 150 states have (on average 1.3) internal successors, (195), 159 states have internal predecessors, (195), 31 states have call successors, (31), 9 states have call predecessors, (31), 10 states have return successors, (50), 36 states have call predecessors, (50), 31 states have call successors, (50) [2021-12-21 20:46:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 276 transitions. [2021-12-21 20:46:37,578 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 276 transitions. Word has length 32 [2021-12-21 20:46:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:37,578 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 276 transitions. [2021-12-21 20:46:37,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 20:46:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 276 transitions. [2021-12-21 20:46:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 20:46:37,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:37,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:37,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:37,797 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,SelfDestructingSolverStorable9 [2021-12-21 20:46:37,797 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1848456444, now seen corresponding path program 1 times [2021-12-21 20:46:37,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:37,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368308587] [2021-12-21 20:46:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:37,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:37,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:37,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420912954] [2021-12-21 20:46:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:37,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:37,819 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) [2021-12-21 20:46:37,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 20:46:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 20:46:37,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 20:46:37,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:37,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:37,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368308587] [2021-12-21 20:46:37,909 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:37,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420912954] [2021-12-21 20:46:37,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420912954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:37,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:37,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:46:37,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119232432] [2021-12-21 20:46:37,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:37,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:46:37,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:46:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:46:37,910 INFO L87 Difference]: Start difference. First operand 205 states and 276 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:46:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:37,930 INFO L93 Difference]: Finished difference Result 217 states and 291 transitions. [2021-12-21 20:46:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:46:37,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-12-21 20:46:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:37,932 INFO L225 Difference]: With dead ends: 217 [2021-12-21 20:46:37,932 INFO L226 Difference]: Without dead ends: 216 [2021-12-21 20:46:37,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:46:37,933 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 7 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:37,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 176 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-21 20:46:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2021-12-21 20:46:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 157 states have (on average 1.286624203821656) internal successors, (202), 164 states have internal predecessors, (202), 32 states have call successors, (32), 9 states have call predecessors, (32), 10 states have return successors, (51), 39 states have call predecessors, (51), 32 states have call successors, (51) [2021-12-21 20:46:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 285 transitions. [2021-12-21 20:46:37,941 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 285 transitions. Word has length 38 [2021-12-21 20:46:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:37,941 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 285 transitions. [2021-12-21 20:46:37,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:46:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 285 transitions. [2021-12-21 20:46:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 20:46:37,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:37,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:37,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:38,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:38,160 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1467574807, now seen corresponding path program 1 times [2021-12-21 20:46:38,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:38,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491870469] [2021-12-21 20:46:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:38,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:38,166 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:38,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37129233] [2021-12-21 20:46:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:38,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:38,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:38,167 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) [2021-12-21 20:46:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 20:46:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:38,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 20:46:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 20:46:38,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:38,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491870469] [2021-12-21 20:46:38,241 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:38,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37129233] [2021-12-21 20:46:38,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37129233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:38,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:38,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:46:38,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453631116] [2021-12-21 20:46:38,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:46:38,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:38,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:46:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:46:38,243 INFO L87 Difference]: Start difference. First operand 213 states and 285 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:46:38,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:38,258 INFO L93 Difference]: Finished difference Result 213 states and 285 transitions. [2021-12-21 20:46:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 20:46:38,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-12-21 20:46:38,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:38,260 INFO L225 Difference]: With dead ends: 213 [2021-12-21 20:46:38,260 INFO L226 Difference]: Without dead ends: 212 [2021-12-21 20:46:38,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:46:38,261 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:38,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 152 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-21 20:46:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-21 20:46:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 157 states have (on average 1.2738853503184713) internal successors, (200), 163 states have internal predecessors, (200), 32 states have call successors, (32), 9 states have call predecessors, (32), 10 states have return successors, (51), 39 states have call predecessors, (51), 32 states have call successors, (51) [2021-12-21 20:46:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 283 transitions. [2021-12-21 20:46:38,269 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 283 transitions. Word has length 39 [2021-12-21 20:46:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:38,269 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 283 transitions. [2021-12-21 20:46:38,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:46:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 283 transitions. [2021-12-21 20:46:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 20:46:38,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:38,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:38,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:38,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:38,487 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2048877323, now seen corresponding path program 1 times [2021-12-21 20:46:38,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:38,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953717336] [2021-12-21 20:46:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:38,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:38,492 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896779337] [2021-12-21 20:46:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:38,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:38,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:38,494 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) [2021-12-21 20:46:38,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 20:46:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 20:46:38,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 20:46:38,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:38,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953717336] [2021-12-21 20:46:38,582 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:38,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896779337] [2021-12-21 20:46:38,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896779337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:38,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:38,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:46:38,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032941351] [2021-12-21 20:46:38,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:38,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:46:38,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:38,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:46:38,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:46:38,583 INFO L87 Difference]: Start difference. First operand 212 states and 283 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:46:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:38,605 INFO L93 Difference]: Finished difference Result 218 states and 288 transitions. [2021-12-21 20:46:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:46:38,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-12-21 20:46:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:38,607 INFO L225 Difference]: With dead ends: 218 [2021-12-21 20:46:38,607 INFO L226 Difference]: Without dead ends: 217 [2021-12-21 20:46:38,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:46:38,607 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:38,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 167 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-21 20:46:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2021-12-21 20:46:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 159 states have (on average 1.270440251572327) internal successors, (202), 165 states have internal predecessors, (202), 32 states have call successors, (32), 9 states have call predecessors, (32), 10 states have return successors, (51), 39 states have call predecessors, (51), 32 states have call successors, (51) [2021-12-21 20:46:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 285 transitions. [2021-12-21 20:46:38,615 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 285 transitions. Word has length 42 [2021-12-21 20:46:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:38,616 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 285 transitions. [2021-12-21 20:46:38,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:46:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 285 transitions. [2021-12-21 20:46:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 20:46:38,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:38,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:38,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:38,819 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,SelfDestructingSolverStorable12 [2021-12-21 20:46:38,820 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 909312544, now seen corresponding path program 1 times [2021-12-21 20:46:38,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301237907] [2021-12-21 20:46:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:38,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:38,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:38,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861278851] [2021-12-21 20:46:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:38,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:38,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:38,827 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) [2021-12-21 20:46:38,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 20:46:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 20:46:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 20:46:38,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:38,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:38,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301237907] [2021-12-21 20:46:38,920 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:38,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861278851] [2021-12-21 20:46:38,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861278851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:38,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:38,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:46:38,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086527857] [2021-12-21 20:46:38,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:38,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:46:38,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:46:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:46:38,921 INFO L87 Difference]: Start difference. First operand 214 states and 285 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:46:38,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:38,937 INFO L93 Difference]: Finished difference Result 214 states and 285 transitions. [2021-12-21 20:46:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 20:46:38,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2021-12-21 20:46:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:38,938 INFO L225 Difference]: With dead ends: 214 [2021-12-21 20:46:38,938 INFO L226 Difference]: Without dead ends: 213 [2021-12-21 20:46:38,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:46:38,939 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:38,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-21 20:46:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-12-21 20:46:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 164 states have internal predecessors, (201), 32 states have call successors, (32), 9 states have call predecessors, (32), 10 states have return successors, (51), 39 states have call predecessors, (51), 32 states have call successors, (51) [2021-12-21 20:46:38,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 284 transitions. [2021-12-21 20:46:38,947 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 284 transitions. Word has length 43 [2021-12-21 20:46:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:38,948 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 284 transitions. [2021-12-21 20:46:38,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:46:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 284 transitions. [2021-12-21 20:46:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 20:46:38,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:38,964 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:38,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:39,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:39,165 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:39,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1923383932, now seen corresponding path program 1 times [2021-12-21 20:46:39,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:39,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919820407] [2021-12-21 20:46:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:39,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:39,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:39,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070114496] [2021-12-21 20:46:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:39,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:39,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:39,175 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) [2021-12-21 20:46:39,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 20:46:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 20:46:39,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 20:46:39,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 20:46:39,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:39,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919820407] [2021-12-21 20:46:39,410 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:39,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070114496] [2021-12-21 20:46:39,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070114496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:39,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:39,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-21 20:46:39,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566233530] [2021-12-21 20:46:39,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:39,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 20:46:39,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:39,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 20:46:39,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-21 20:46:39,411 INFO L87 Difference]: Start difference. First operand 213 states and 284 transitions. Second operand has 16 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 20:46:39,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:39,642 INFO L93 Difference]: Finished difference Result 316 states and 409 transitions. [2021-12-21 20:46:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 20:46:39,643 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2021-12-21 20:46:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:39,644 INFO L225 Difference]: With dead ends: 316 [2021-12-21 20:46:39,644 INFO L226 Difference]: Without dead ends: 315 [2021-12-21 20:46:39,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-12-21 20:46:39,645 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 182 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:39,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 633 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:46:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-12-21 20:46:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 278. [2021-12-21 20:46:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 209 states have (on average 1.30622009569378) internal successors, (273), 216 states have internal predecessors, (273), 42 states have call successors, (42), 12 states have call predecessors, (42), 15 states have return successors, (69), 49 states have call predecessors, (69), 42 states have call successors, (69) [2021-12-21 20:46:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 384 transitions. [2021-12-21 20:46:39,671 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 384 transitions. Word has length 47 [2021-12-21 20:46:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:39,671 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 384 transitions. [2021-12-21 20:46:39,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 20:46:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 384 transitions. [2021-12-21 20:46:39,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 20:46:39,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:39,672 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:39,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:39,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:39,889 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:39,890 INFO L85 PathProgramCache]: Analyzing trace with hash -504640214, now seen corresponding path program 1 times [2021-12-21 20:46:39,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:39,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317106302] [2021-12-21 20:46:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:39,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:39,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:39,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009694818] [2021-12-21 20:46:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:39,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:39,898 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) [2021-12-21 20:46:39,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 20:46:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:39,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 20:46:39,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 20:46:39,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:39,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:39,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317106302] [2021-12-21 20:46:39,985 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009694818] [2021-12-21 20:46:39,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009694818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:39,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:39,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:46:39,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419405270] [2021-12-21 20:46:39,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:39,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 20:46:39,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 20:46:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:46:39,988 INFO L87 Difference]: Start difference. First operand 278 states and 384 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 20:46:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:40,000 INFO L93 Difference]: Finished difference Result 278 states and 384 transitions. [2021-12-21 20:46:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 20:46:40,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-12-21 20:46:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:40,001 INFO L225 Difference]: With dead ends: 278 [2021-12-21 20:46:40,002 INFO L226 Difference]: Without dead ends: 277 [2021-12-21 20:46:40,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:46:40,002 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:40,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-21 20:46:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-12-21 20:46:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 209 states have (on average 1.291866028708134) internal successors, (270), 215 states have internal predecessors, (270), 42 states have call successors, (42), 12 states have call predecessors, (42), 15 states have return successors, (69), 49 states have call predecessors, (69), 42 states have call successors, (69) [2021-12-21 20:46:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 381 transitions. [2021-12-21 20:46:40,013 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 381 transitions. Word has length 48 [2021-12-21 20:46:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:40,013 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 381 transitions. [2021-12-21 20:46:40,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 20:46:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 381 transitions. [2021-12-21 20:46:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 20:46:40,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:40,015 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:40,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:40,232 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,SelfDestructingSolverStorable15 [2021-12-21 20:46:40,232 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:40,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:40,233 INFO L85 PathProgramCache]: Analyzing trace with hash -169316457, now seen corresponding path program 1 times [2021-12-21 20:46:40,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:40,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649891926] [2021-12-21 20:46:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:40,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:40,237 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:40,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527957801] [2021-12-21 20:46:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:40,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:40,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:40,255 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) [2021-12-21 20:46:40,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 20:46:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 20:46:40,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 20:46:40,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:40,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649891926] [2021-12-21 20:46:40,406 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527957801] [2021-12-21 20:46:40,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527957801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:40,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:40,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 20:46:40,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829434361] [2021-12-21 20:46:40,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:40,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 20:46:40,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 20:46:40,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:46:40,409 INFO L87 Difference]: Start difference. First operand 277 states and 381 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 20:46:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:40,455 INFO L93 Difference]: Finished difference Result 496 states and 685 transitions. [2021-12-21 20:46:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 20:46:40,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2021-12-21 20:46:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:40,456 INFO L225 Difference]: With dead ends: 496 [2021-12-21 20:46:40,456 INFO L226 Difference]: Without dead ends: 253 [2021-12-21 20:46:40,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:46:40,458 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 23 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:40,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 109 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:40,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-21 20:46:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2021-12-21 20:46:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 189 states have (on average 1.2804232804232805) internal successors, (242), 196 states have internal predecessors, (242), 37 states have call successors, (37), 11 states have call predecessors, (37), 14 states have return successors, (61), 43 states have call predecessors, (61), 37 states have call successors, (61) [2021-12-21 20:46:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 340 transitions. [2021-12-21 20:46:40,468 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 340 transitions. Word has length 53 [2021-12-21 20:46:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:40,468 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 340 transitions. [2021-12-21 20:46:40,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 20:46:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 340 transitions. [2021-12-21 20:46:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 20:46:40,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:40,469 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:40,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:40,686 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,SelfDestructingSolverStorable16 [2021-12-21 20:46:40,686 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1084763047, now seen corresponding path program 2 times [2021-12-21 20:46:40,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:40,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284125184] [2021-12-21 20:46:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:40,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:40,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:40,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100736105] [2021-12-21 20:46:40,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:46:40,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:40,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:40,699 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) [2021-12-21 20:46:40,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 20:46:40,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:46:40,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:46:40,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 20:46:40,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 20:46:40,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:40,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:40,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284125184] [2021-12-21 20:46:40,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:40,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100736105] [2021-12-21 20:46:40,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100736105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:40,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:40,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 20:46:40,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58423950] [2021-12-21 20:46:40,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:40,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 20:46:40,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 20:46:40,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:46:40,822 INFO L87 Difference]: Start difference. First operand 251 states and 340 transitions. Second operand has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 20:46:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:40,919 INFO L93 Difference]: Finished difference Result 516 states and 716 transitions. [2021-12-21 20:46:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:46:40,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2021-12-21 20:46:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:40,921 INFO L225 Difference]: With dead ends: 516 [2021-12-21 20:46:40,921 INFO L226 Difference]: Without dead ends: 303 [2021-12-21 20:46:40,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 20:46:40,922 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 55 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:40,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 365 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-21 20:46:40,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 295. [2021-12-21 20:46:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 223 states have (on average 1.3094170403587444) internal successors, (292), 228 states have internal predecessors, (292), 45 states have call successors, (45), 13 states have call predecessors, (45), 16 states have return successors, (75), 53 states have call predecessors, (75), 45 states have call successors, (75) [2021-12-21 20:46:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 412 transitions. [2021-12-21 20:46:40,934 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 412 transitions. Word has length 53 [2021-12-21 20:46:40,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:40,934 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 412 transitions. [2021-12-21 20:46:40,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 20:46:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 412 transitions. [2021-12-21 20:46:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 20:46:40,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:40,935 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:40,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:41,151 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,SelfDestructingSolverStorable17 [2021-12-21 20:46:41,151 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:41,151 INFO L85 PathProgramCache]: Analyzing trace with hash 275903367, now seen corresponding path program 1 times [2021-12-21 20:46:41,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:41,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122135963] [2021-12-21 20:46:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:41,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:41,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:41,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809371325] [2021-12-21 20:46:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:41,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:41,167 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) [2021-12-21 20:46:41,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 20:46:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:41,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 20:46:41,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 20:46:41,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 20:46:41,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122135963] [2021-12-21 20:46:41,499 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:41,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809371325] [2021-12-21 20:46:41,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809371325] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:41,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:41,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-21 20:46:41,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095623662] [2021-12-21 20:46:41,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:41,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 20:46:41,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:41,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 20:46:41,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-21 20:46:41,500 INFO L87 Difference]: Start difference. First operand 295 states and 412 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 20:46:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:41,670 INFO L93 Difference]: Finished difference Result 533 states and 738 transitions. [2021-12-21 20:46:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 20:46:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2021-12-21 20:46:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:41,672 INFO L225 Difference]: With dead ends: 533 [2021-12-21 20:46:41,672 INFO L226 Difference]: Without dead ends: 323 [2021-12-21 20:46:41,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-12-21 20:46:41,673 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 50 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:41,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 487 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-21 20:46:41,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 305. [2021-12-21 20:46:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 233 states have (on average 1.3047210300429184) internal successors, (304), 238 states have internal predecessors, (304), 45 states have call successors, (45), 13 states have call predecessors, (45), 16 states have return successors, (75), 53 states have call predecessors, (75), 45 states have call successors, (75) [2021-12-21 20:46:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 424 transitions. [2021-12-21 20:46:41,682 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 424 transitions. Word has length 52 [2021-12-21 20:46:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:41,682 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 424 transitions. [2021-12-21 20:46:41,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 20:46:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 424 transitions. [2021-12-21 20:46:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 20:46:41,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:41,683 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:41,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-21 20:46:41,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:41,899 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:41,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:41,899 INFO L85 PathProgramCache]: Analyzing trace with hash 726408517, now seen corresponding path program 1 times [2021-12-21 20:46:41,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:41,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606854091] [2021-12-21 20:46:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:41,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:41,907 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:41,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491999616] [2021-12-21 20:46:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:41,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:41,917 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) [2021-12-21 20:46:41,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 20:46:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:41,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 20:46:41,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 20:46:42,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 20:46:42,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:42,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606854091] [2021-12-21 20:46:42,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:42,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491999616] [2021-12-21 20:46:42,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491999616] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:42,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:42,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-21 20:46:42,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384911040] [2021-12-21 20:46:42,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:42,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 20:46:42,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 20:46:42,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-12-21 20:46:42,256 INFO L87 Difference]: Start difference. First operand 305 states and 424 transitions. Second operand has 20 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-21 20:46:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:42,571 INFO L93 Difference]: Finished difference Result 606 states and 829 transitions. [2021-12-21 20:46:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 20:46:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 55 [2021-12-21 20:46:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:42,572 INFO L225 Difference]: With dead ends: 606 [2021-12-21 20:46:42,572 INFO L226 Difference]: Without dead ends: 392 [2021-12-21 20:46:42,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 20:46:42,574 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 190 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:42,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 868 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 500 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-12-21 20:46:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-21 20:46:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 364. [2021-12-21 20:46:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 282 states have (on average 1.2943262411347518) internal successors, (365), 281 states have internal predecessors, (365), 52 states have call successors, (52), 16 states have call predecessors, (52), 19 states have return successors, (85), 66 states have call predecessors, (85), 52 states have call successors, (85) [2021-12-21 20:46:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 502 transitions. [2021-12-21 20:46:42,588 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 502 transitions. Word has length 55 [2021-12-21 20:46:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:42,588 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 502 transitions. [2021-12-21 20:46:42,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-21 20:46:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 502 transitions. [2021-12-21 20:46:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 20:46:42,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:42,588 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:42,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:42,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:42,806 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1989972148, now seen corresponding path program 1 times [2021-12-21 20:46:42,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:42,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225129725] [2021-12-21 20:46:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:42,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:42,810 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:42,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023182601] [2021-12-21 20:46:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:42,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:42,823 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) [2021-12-21 20:46:42,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 20:46:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:42,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 20:46:42,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 20:46:42,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 20:46:43,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:43,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225129725] [2021-12-21 20:46:43,054 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:43,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023182601] [2021-12-21 20:46:43,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023182601] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:43,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:43,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-12-21 20:46:43,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496931048] [2021-12-21 20:46:43,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:43,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 20:46:43,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:43,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 20:46:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 20:46:43,055 INFO L87 Difference]: Start difference. First operand 364 states and 502 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 20:46:43,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:43,188 INFO L93 Difference]: Finished difference Result 706 states and 977 transitions. [2021-12-21 20:46:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 20:46:43,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 61 [2021-12-21 20:46:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:43,190 INFO L225 Difference]: With dead ends: 706 [2021-12-21 20:46:43,190 INFO L226 Difference]: Without dead ends: 382 [2021-12-21 20:46:43,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-21 20:46:43,192 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 71 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:43,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 499 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-21 20:46:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 363. [2021-12-21 20:46:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 280 states have (on average 1.2892857142857144) internal successors, (361), 281 states have internal predecessors, (361), 52 states have call successors, (52), 17 states have call predecessors, (52), 20 states have return successors, (83), 64 states have call predecessors, (83), 52 states have call successors, (83) [2021-12-21 20:46:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 496 transitions. [2021-12-21 20:46:43,202 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 496 transitions. Word has length 61 [2021-12-21 20:46:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:43,203 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 496 transitions. [2021-12-21 20:46:43,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 20:46:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 496 transitions. [2021-12-21 20:46:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 20:46:43,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:43,205 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:43,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-21 20:46:43,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-21 20:46:43,419 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash -681681031, now seen corresponding path program 1 times [2021-12-21 20:46:43,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208959600] [2021-12-21 20:46:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:43,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:43,425 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:43,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94185796] [2021-12-21 20:46:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:43,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:43,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:43,427 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) [2021-12-21 20:46:43,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 20:46:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:43,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 20:46:43,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-21 20:46:43,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:43,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208959600] [2021-12-21 20:46:43,539 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94185796] [2021-12-21 20:46:43,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94185796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:43,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:43,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 20:46:43,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592024232] [2021-12-21 20:46:43,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:43,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 20:46:43,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:43,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 20:46:43,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 20:46:43,541 INFO L87 Difference]: Start difference. First operand 363 states and 496 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 20:46:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:43,602 INFO L93 Difference]: Finished difference Result 683 states and 928 transitions. [2021-12-21 20:46:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:46:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2021-12-21 20:46:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:43,604 INFO L225 Difference]: With dead ends: 683 [2021-12-21 20:46:43,604 INFO L226 Difference]: Without dead ends: 369 [2021-12-21 20:46:43,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:46:43,605 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 41 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:43,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 366 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-21 20:46:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 359. [2021-12-21 20:46:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 277 states have (on average 1.2779783393501805) internal successors, (354), 278 states have internal predecessors, (354), 50 states have call successors, (50), 18 states have call predecessors, (50), 21 states have return successors, (77), 62 states have call predecessors, (77), 50 states have call successors, (77) [2021-12-21 20:46:43,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 481 transitions. [2021-12-21 20:46:43,615 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 481 transitions. Word has length 63 [2021-12-21 20:46:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:43,616 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 481 transitions. [2021-12-21 20:46:43,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 20:46:43,616 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 481 transitions. [2021-12-21 20:46:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 20:46:43,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:43,616 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:43,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:43,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:43,833 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting binomialCoefficientErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1354749825, now seen corresponding path program 1 times [2021-12-21 20:46:43,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:43,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378294349] [2021-12-21 20:46:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:43,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:43,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:43,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246004681] [2021-12-21 20:46:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:43,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:43,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:43,841 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) [2021-12-21 20:46:43,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 20:46:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:43,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 20:46:43,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 20:46:44,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 20:46:44,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378294349] [2021-12-21 20:46:44,174 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246004681] [2021-12-21 20:46:44,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246004681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:44,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:44,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 20:46:44,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38466677] [2021-12-21 20:46:44,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:44,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 20:46:44,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 20:46:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-21 20:46:44,175 INFO L87 Difference]: Start difference. First operand 359 states and 481 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 7 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 20:46:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:44,399 INFO L93 Difference]: Finished difference Result 442 states and 589 transitions. [2021-12-21 20:46:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 20:46:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 7 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 66 [2021-12-21 20:46:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:44,401 INFO L225 Difference]: With dead ends: 442 [2021-12-21 20:46:44,401 INFO L226 Difference]: Without dead ends: 441 [2021-12-21 20:46:44,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-12-21 20:46:44,401 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 124 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:44,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 625 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-12-21 20:46:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 418. [2021-12-21 20:46:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 322 states have (on average 1.279503105590062) internal successors, (412), 322 states have internal predecessors, (412), 62 states have call successors, (62), 20 states have call predecessors, (62), 23 states have return successors, (98), 75 states have call predecessors, (98), 62 states have call successors, (98) [2021-12-21 20:46:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 572 transitions. [2021-12-21 20:46:44,413 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 572 transitions. Word has length 66 [2021-12-21 20:46:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:44,413 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 572 transitions. [2021-12-21 20:46:44,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 7 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 20:46:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 572 transitions. [2021-12-21 20:46:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 20:46:44,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:44,413 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:44,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:44,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:44,630 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting binomialCoefficientErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash 952428439, now seen corresponding path program 1 times [2021-12-21 20:46:44,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:44,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562817025] [2021-12-21 20:46:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:44,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:44,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:44,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923503641] [2021-12-21 20:46:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:44,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:44,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:44,636 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) [2021-12-21 20:46:44,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 20:46:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:44,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 20:46:44,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-21 20:46:44,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:44,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:44,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562817025] [2021-12-21 20:46:44,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:44,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923503641] [2021-12-21 20:46:44,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923503641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:44,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:44,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 20:46:44,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773973853] [2021-12-21 20:46:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:44,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 20:46:44,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 20:46:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:46:44,818 INFO L87 Difference]: Start difference. First operand 418 states and 572 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 20:46:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:44,908 INFO L93 Difference]: Finished difference Result 425 states and 573 transitions. [2021-12-21 20:46:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 20:46:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 67 [2021-12-21 20:46:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:44,910 INFO L225 Difference]: With dead ends: 425 [2021-12-21 20:46:44,910 INFO L226 Difference]: Without dead ends: 424 [2021-12-21 20:46:44,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 20:46:44,911 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 46 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:44,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 357 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-21 20:46:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 418. [2021-12-21 20:46:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 322 states have (on average 1.2732919254658386) internal successors, (410), 322 states have internal predecessors, (410), 62 states have call successors, (62), 20 states have call predecessors, (62), 23 states have return successors, (98), 75 states have call predecessors, (98), 62 states have call successors, (98) [2021-12-21 20:46:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 570 transitions. [2021-12-21 20:46:44,923 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 570 transitions. Word has length 67 [2021-12-21 20:46:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:44,923 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 570 transitions. [2021-12-21 20:46:44,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 20:46:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 570 transitions. [2021-12-21 20:46:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 20:46:44,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:44,924 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:44,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:45,138 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,SelfDestructingSolverStorable23 [2021-12-21 20:46:45,139 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash -159097642, now seen corresponding path program 2 times [2021-12-21 20:46:45,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:45,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222317871] [2021-12-21 20:46:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:45,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:45,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:45,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338045015] [2021-12-21 20:46:45,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:46:45,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:45,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:45,147 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) [2021-12-21 20:46:45,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 20:46:45,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:46:45,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:46:45,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 20:46:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 20:46:45,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 20:46:45,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:45,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222317871] [2021-12-21 20:46:45,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:45,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338045015] [2021-12-21 20:46:45,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338045015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:45,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:45,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-21 20:46:45,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333263339] [2021-12-21 20:46:45,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:45,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 20:46:45,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 20:46:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-12-21 20:46:45,486 INFO L87 Difference]: Start difference. First operand 418 states and 570 transitions. Second operand has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 20:46:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:45,715 INFO L93 Difference]: Finished difference Result 478 states and 628 transitions. [2021-12-21 20:46:45,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 20:46:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 71 [2021-12-21 20:46:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:45,720 INFO L225 Difference]: With dead ends: 478 [2021-12-21 20:46:45,720 INFO L226 Difference]: Without dead ends: 477 [2021-12-21 20:46:45,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-12-21 20:46:45,720 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 144 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:45,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 553 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:46:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-12-21 20:46:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 466. [2021-12-21 20:46:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 359 states have (on average 1.2701949860724233) internal successors, (456), 361 states have internal predecessors, (456), 66 states have call successors, (66), 24 states have call predecessors, (66), 30 states have return successors, (103), 80 states have call predecessors, (103), 66 states have call successors, (103) [2021-12-21 20:46:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 625 transitions. [2021-12-21 20:46:45,733 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 625 transitions. Word has length 71 [2021-12-21 20:46:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:45,734 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 625 transitions. [2021-12-21 20:46:45,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 12 states have internal predecessors, (61), 7 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 20:46:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 625 transitions. [2021-12-21 20:46:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 20:46:45,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:45,734 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:45,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:45,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:45,950 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting binomialCoefficientErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:45,950 INFO L85 PathProgramCache]: Analyzing trace with hash -927342394, now seen corresponding path program 1 times [2021-12-21 20:46:45,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:45,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143836430] [2021-12-21 20:46:45,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:45,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:45,956 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:45,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765862759] [2021-12-21 20:46:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:45,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:45,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:45,972 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:45,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 20:46:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 20:46:46,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 20:46:46,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:46,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143836430] [2021-12-21 20:46:46,148 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765862759] [2021-12-21 20:46:46,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765862759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:46,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:46,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 20:46:46,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898681311] [2021-12-21 20:46:46,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:46,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 20:46:46,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 20:46:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 20:46:46,149 INFO L87 Difference]: Start difference. First operand 466 states and 625 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 20:46:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:46,318 INFO L93 Difference]: Finished difference Result 875 states and 1185 transitions. [2021-12-21 20:46:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 20:46:46,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2021-12-21 20:46:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:46,320 INFO L225 Difference]: With dead ends: 875 [2021-12-21 20:46:46,320 INFO L226 Difference]: Without dead ends: 466 [2021-12-21 20:46:46,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-21 20:46:46,321 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:46,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 296 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-12-21 20:46:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 458. [2021-12-21 20:46:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 352 states have (on average 1.2727272727272727) internal successors, (448), 355 states have internal predecessors, (448), 66 states have call successors, (66), 24 states have call predecessors, (66), 29 states have return successors, (101), 78 states have call predecessors, (101), 66 states have call successors, (101) [2021-12-21 20:46:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 615 transitions. [2021-12-21 20:46:46,337 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 615 transitions. Word has length 76 [2021-12-21 20:46:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:46,337 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 615 transitions. [2021-12-21 20:46:46,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 20:46:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 615 transitions. [2021-12-21 20:46:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 20:46:46,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:46,337 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:46,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:46,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:46,551 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:46,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash -960430689, now seen corresponding path program 1 times [2021-12-21 20:46:46,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:46,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477252702] [2021-12-21 20:46:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:46,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:46,557 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:46,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558139977] [2021-12-21 20:46:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:46,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:46,558 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:46,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 20:46:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 20:46:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 20:46:46,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-21 20:46:46,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:46,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477252702] [2021-12-21 20:46:46,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:46,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558139977] [2021-12-21 20:46:46,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558139977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:46,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:46,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-21 20:46:46,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437598288] [2021-12-21 20:46:46,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:46,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 20:46:46,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 20:46:46,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-12-21 20:46:46,953 INFO L87 Difference]: Start difference. First operand 458 states and 615 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-21 20:46:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:47,409 INFO L93 Difference]: Finished difference Result 538 states and 695 transitions. [2021-12-21 20:46:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 20:46:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 79 [2021-12-21 20:46:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:47,411 INFO L225 Difference]: With dead ends: 538 [2021-12-21 20:46:47,411 INFO L226 Difference]: Without dead ends: 537 [2021-12-21 20:46:47,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 20:46:47,412 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 180 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:47,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 709 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 527 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2021-12-21 20:46:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-12-21 20:46:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 506. [2021-12-21 20:46:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 391 states have (on average 1.2659846547314577) internal successors, (495), 391 states have internal predecessors, (495), 69 states have call successors, (69), 28 states have call predecessors, (69), 35 states have return successors, (109), 86 states have call predecessors, (109), 69 states have call successors, (109) [2021-12-21 20:46:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 673 transitions. [2021-12-21 20:46:47,426 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 673 transitions. Word has length 79 [2021-12-21 20:46:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:47,426 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 673 transitions. [2021-12-21 20:46:47,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 18 states have internal predecessors, (69), 9 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-21 20:46:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 673 transitions. [2021-12-21 20:46:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-21 20:46:47,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:47,428 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:47,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:47,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:47,646 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting factErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:47,646 INFO L85 PathProgramCache]: Analyzing trace with hash 291419757, now seen corresponding path program 1 times [2021-12-21 20:46:47,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:47,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641571550] [2021-12-21 20:46:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:47,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:47,650 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:47,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833722054] [2021-12-21 20:46:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:47,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:47,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:47,666 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:47,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 20:46:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:47,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 20:46:47,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-21 20:46:47,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:47,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:47,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641571550] [2021-12-21 20:46:47,805 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:47,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833722054] [2021-12-21 20:46:47,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833722054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:47,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:47,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 20:46:47,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429254045] [2021-12-21 20:46:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:47,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 20:46:47,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:47,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 20:46:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:46:47,806 INFO L87 Difference]: Start difference. First operand 506 states and 673 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 20:46:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:47,836 INFO L93 Difference]: Finished difference Result 508 states and 676 transitions. [2021-12-21 20:46:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 20:46:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2021-12-21 20:46:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:47,839 INFO L225 Difference]: With dead ends: 508 [2021-12-21 20:46:47,839 INFO L226 Difference]: Without dead ends: 507 [2021-12-21 20:46:47,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 20:46:47,839 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:47,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 214 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-12-21 20:46:47,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 505. [2021-12-21 20:46:47,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 391 states have (on average 1.2404092071611252) internal successors, (485), 390 states have internal predecessors, (485), 69 states have call successors, (69), 28 states have call predecessors, (69), 35 states have return successors, (109), 86 states have call predecessors, (109), 69 states have call successors, (109) [2021-12-21 20:46:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 663 transitions. [2021-12-21 20:46:47,853 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 663 transitions. Word has length 80 [2021-12-21 20:46:47,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:47,854 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 663 transitions. [2021-12-21 20:46:47,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 20:46:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 663 transitions. [2021-12-21 20:46:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 20:46:47,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:47,856 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:47,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:48,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-21 20:46:48,073 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting binomialCoefficientErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:48,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1026169764, now seen corresponding path program 1 times [2021-12-21 20:46:48,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:48,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271106285] [2021-12-21 20:46:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:48,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:48,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:48,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217023805] [2021-12-21 20:46:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:48,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:48,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:48,079 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:48,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 20:46:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 20:46:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-21 20:46:48,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:48,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271106285] [2021-12-21 20:46:48,288 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217023805] [2021-12-21 20:46:48,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217023805] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:46:48,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:46:48,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-12-21 20:46:48,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14469016] [2021-12-21 20:46:48,288 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:48,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:46:48,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:46:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 20:46:48,289 INFO L87 Difference]: Start difference. First operand 505 states and 663 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 20:46:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:48,330 INFO L93 Difference]: Finished difference Result 543 states and 720 transitions. [2021-12-21 20:46:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:46:48,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2021-12-21 20:46:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:48,344 INFO L225 Difference]: With dead ends: 543 [2021-12-21 20:46:48,344 INFO L226 Difference]: Without dead ends: 542 [2021-12-21 20:46:48,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 20:46:48,345 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:48,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 197 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-21 20:46:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 517. [2021-12-21 20:46:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 403 states have (on average 1.2258064516129032) internal successors, (494), 396 states have internal predecessors, (494), 69 states have call successors, (69), 28 states have call predecessors, (69), 35 states have return successors, (109), 92 states have call predecessors, (109), 69 states have call successors, (109) [2021-12-21 20:46:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 672 transitions. [2021-12-21 20:46:48,358 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 672 transitions. Word has length 84 [2021-12-21 20:46:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:48,358 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 672 transitions. [2021-12-21 20:46:48,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 20:46:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 672 transitions. [2021-12-21 20:46:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-21 20:46:48,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:48,359 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:48,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:48,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 20:46:48,575 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting binomialCoefficientErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:48,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1746491672, now seen corresponding path program 1 times [2021-12-21 20:46:48,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:48,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765805861] [2021-12-21 20:46:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:48,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:48,581 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:48,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951938954] [2021-12-21 20:46:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:48,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:48,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:48,596 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:48,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 20:46:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 20:46:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-21 20:46:48,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:48,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:48,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765805861] [2021-12-21 20:46:48,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:48,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951938954] [2021-12-21 20:46:48,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951938954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:48,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:48,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 20:46:48,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762704418] [2021-12-21 20:46:48,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:48,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 20:46:48,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 20:46:48,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:46:48,867 INFO L87 Difference]: Start difference. First operand 517 states and 672 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 20:46:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:48,919 INFO L93 Difference]: Finished difference Result 519 states and 675 transitions. [2021-12-21 20:46:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 20:46:48,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-12-21 20:46:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:48,921 INFO L225 Difference]: With dead ends: 519 [2021-12-21 20:46:48,921 INFO L226 Difference]: Without dead ends: 518 [2021-12-21 20:46:48,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:46:48,922 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 21 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:48,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 218 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-12-21 20:46:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 495. [2021-12-21 20:46:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 382 states have (on average 1.2146596858638743) internal successors, (464), 381 states have internal predecessors, (464), 69 states have call successors, (69), 28 states have call predecessors, (69), 35 states have return successors, (109), 85 states have call predecessors, (109), 69 states have call successors, (109) [2021-12-21 20:46:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 642 transitions. [2021-12-21 20:46:48,938 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 642 transitions. Word has length 85 [2021-12-21 20:46:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:48,938 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 642 transitions. [2021-12-21 20:46:48,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 20:46:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 642 transitions. [2021-12-21 20:46:48,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-21 20:46:48,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:48,939 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:48,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-21 20:46:49,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:49,154 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting binomialCoefficientErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1693332954, now seen corresponding path program 2 times [2021-12-21 20:46:49,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:49,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126271402] [2021-12-21 20:46:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:49,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:49,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:49,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682665663] [2021-12-21 20:46:49,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:46:49,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:49,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:49,174 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:49,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-21 20:46:49,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:46:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:46:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 20:46:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-21 20:46:49,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:49,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126271402] [2021-12-21 20:46:49,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682665663] [2021-12-21 20:46:49,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682665663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:49,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:49,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 20:46:49,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024378545] [2021-12-21 20:46:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:49,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 20:46:49,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 20:46:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:46:49,457 INFO L87 Difference]: Start difference. First operand 495 states and 642 transitions. Second operand has 9 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 20:46:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:49,505 INFO L93 Difference]: Finished difference Result 497 states and 645 transitions. [2021-12-21 20:46:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 20:46:49,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-12-21 20:46:49,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:49,507 INFO L225 Difference]: With dead ends: 497 [2021-12-21 20:46:49,507 INFO L226 Difference]: Without dead ends: 495 [2021-12-21 20:46:49,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-21 20:46:49,508 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:49,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 206 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-21 20:46:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 432. [2021-12-21 20:46:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 334 states have (on average 1.1706586826347305) internal successors, (391), 333 states have internal predecessors, (391), 59 states have call successors, (59), 28 states have call predecessors, (59), 32 states have return successors, (74), 70 states have call predecessors, (74), 59 states have call successors, (74) [2021-12-21 20:46:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 524 transitions. [2021-12-21 20:46:49,519 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 524 transitions. Word has length 86 [2021-12-21 20:46:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:49,519 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 524 transitions. [2021-12-21 20:46:49,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.0) internal successors, (42), 8 states have internal predecessors, (42), 4 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 20:46:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 524 transitions. [2021-12-21 20:46:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-21 20:46:49,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:49,520 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:49,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:49,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:49,737 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:49,737 INFO L85 PathProgramCache]: Analyzing trace with hash 253172159, now seen corresponding path program 2 times [2021-12-21 20:46:49,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:49,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720113104] [2021-12-21 20:46:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:49,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:49,744 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:49,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262862532] [2021-12-21 20:46:49,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:46:49,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:49,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:49,746 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:49,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-21 20:46:49,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:46:49,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:46:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 20:46:49,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 20:46:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 20:46:50,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720113104] [2021-12-21 20:46:50,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262862532] [2021-12-21 20:46:50,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262862532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:50,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:50,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-12-21 20:46:50,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482748759] [2021-12-21 20:46:50,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:50,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 20:46:50,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:50,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 20:46:50,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-21 20:46:50,184 INFO L87 Difference]: Start difference. First operand 432 states and 524 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-21 20:46:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:50,561 INFO L93 Difference]: Finished difference Result 831 states and 1028 transitions. [2021-12-21 20:46:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 20:46:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 89 [2021-12-21 20:46:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:50,563 INFO L225 Difference]: With dead ends: 831 [2021-12-21 20:46:50,563 INFO L226 Difference]: Without dead ends: 459 [2021-12-21 20:46:50,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-12-21 20:46:50,564 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 113 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:50,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 714 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 20:46:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-21 20:46:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 434. [2021-12-21 20:46:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 335 states have (on average 1.164179104477612) internal successors, (390), 335 states have internal predecessors, (390), 59 states have call successors, (59), 30 states have call predecessors, (59), 33 states have return successors, (72), 68 states have call predecessors, (72), 59 states have call successors, (72) [2021-12-21 20:46:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 521 transitions. [2021-12-21 20:46:50,576 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 521 transitions. Word has length 89 [2021-12-21 20:46:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:50,576 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 521 transitions. [2021-12-21 20:46:50,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 15 states have internal predecessors, (68), 9 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-21 20:46:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 521 transitions. [2021-12-21 20:46:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 20:46:50,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:50,577 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:50,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:50,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:50,794 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash 929332397, now seen corresponding path program 1 times [2021-12-21 20:46:50,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:50,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613395463] [2021-12-21 20:46:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:50,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:50,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:50,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723685393] [2021-12-21 20:46:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:50,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:50,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:50,802 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:50,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-21 20:46:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 20:46:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-21 20:46:50,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-21 20:46:51,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:51,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613395463] [2021-12-21 20:46:51,185 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:51,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723685393] [2021-12-21 20:46:51,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723685393] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:51,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:51,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-21 20:46:51,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709650529] [2021-12-21 20:46:51,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:51,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 20:46:51,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 20:46:51,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-21 20:46:51,186 INFO L87 Difference]: Start difference. First operand 434 states and 521 transitions. Second operand has 16 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 20:46:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:51,412 INFO L93 Difference]: Finished difference Result 585 states and 719 transitions. [2021-12-21 20:46:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 20:46:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 106 [2021-12-21 20:46:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:51,414 INFO L225 Difference]: With dead ends: 585 [2021-12-21 20:46:51,415 INFO L226 Difference]: Without dead ends: 582 [2021-12-21 20:46:51,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-12-21 20:46:51,415 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 138 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:51,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 509 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:46:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-12-21 20:46:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 554. [2021-12-21 20:46:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 430 states have (on average 1.1790697674418604) internal successors, (507), 430 states have internal predecessors, (507), 78 states have call successors, (78), 36 states have call predecessors, (78), 39 states have return successors, (91), 87 states have call predecessors, (91), 78 states have call successors, (91) [2021-12-21 20:46:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 676 transitions. [2021-12-21 20:46:51,443 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 676 transitions. Word has length 106 [2021-12-21 20:46:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:51,443 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 676 transitions. [2021-12-21 20:46:51,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 20:46:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 676 transitions. [2021-12-21 20:46:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 20:46:51,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:51,444 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 7, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:51,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:51,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-21 20:46:51,661 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2016742028, now seen corresponding path program 2 times [2021-12-21 20:46:51,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:51,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189544810] [2021-12-21 20:46:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:51,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:51,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:51,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303760332] [2021-12-21 20:46:51,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:46:51,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:51,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:51,676 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:51,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-21 20:46:51,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:46:51,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:46:51,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 20:46:51,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-21 20:46:51,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:46:51,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189544810] [2021-12-21 20:46:51,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:51,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303760332] [2021-12-21 20:46:51,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303760332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:46:51,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:46:51,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 20:46:51,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961561866] [2021-12-21 20:46:51,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:46:51,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 20:46:51,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 20:46:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:46:51,848 INFO L87 Difference]: Start difference. First operand 554 states and 676 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 20:46:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:51,897 INFO L93 Difference]: Finished difference Result 878 states and 1076 transitions. [2021-12-21 20:46:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 20:46:51,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 112 [2021-12-21 20:46:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:51,905 INFO L225 Difference]: With dead ends: 878 [2021-12-21 20:46:51,905 INFO L226 Difference]: Without dead ends: 487 [2021-12-21 20:46:51,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 20:46:51,907 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 24 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:51,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 252 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:46:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-12-21 20:46:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 486. [2021-12-21 20:46:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 378 states have (on average 1.1587301587301588) internal successors, (438), 378 states have internal predecessors, (438), 65 states have call successors, (65), 33 states have call predecessors, (65), 36 states have return successors, (76), 74 states have call predecessors, (76), 65 states have call successors, (76) [2021-12-21 20:46:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 579 transitions. [2021-12-21 20:46:51,936 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 579 transitions. Word has length 112 [2021-12-21 20:46:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:51,936 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 579 transitions. [2021-12-21 20:46:51,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 20:46:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 579 transitions. [2021-12-21 20:46:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 20:46:51,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:51,937 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:51,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-21 20:46:52,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-21 20:46:52,152 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash -158640522, now seen corresponding path program 1 times [2021-12-21 20:46:52,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:52,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466084399] [2021-12-21 20:46:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:52,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:52,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:52,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531118702] [2021-12-21 20:46:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:52,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:52,158 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:52,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-21 20:46:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:52,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 20:46:52,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 46 proven. 9 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-21 20:46:52,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 46 proven. 9 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-21 20:46:52,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466084399] [2021-12-21 20:46:52,803 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531118702] [2021-12-21 20:46:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531118702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:52,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:52,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-12-21 20:46:52,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115670986] [2021-12-21 20:46:52,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:52,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 20:46:52,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 20:46:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-12-21 20:46:52,804 INFO L87 Difference]: Start difference. First operand 486 states and 579 transitions. Second operand has 20 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 20:46:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:53,579 INFO L93 Difference]: Finished difference Result 874 states and 1068 transitions. [2021-12-21 20:46:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 20:46:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 114 [2021-12-21 20:46:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:53,581 INFO L225 Difference]: With dead ends: 874 [2021-12-21 20:46:53,582 INFO L226 Difference]: Without dead ends: 529 [2021-12-21 20:46:53,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-12-21 20:46:53,583 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 118 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:53,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 917 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 488 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2021-12-21 20:46:53,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-12-21 20:46:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 508. [2021-12-21 20:46:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 396 states have (on average 1.1464646464646464) internal successors, (454), 395 states have internal predecessors, (454), 66 states have call successors, (66), 34 states have call predecessors, (66), 39 states have return successors, (81), 78 states have call predecessors, (81), 66 states have call successors, (81) [2021-12-21 20:46:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 601 transitions. [2021-12-21 20:46:53,598 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 601 transitions. Word has length 114 [2021-12-21 20:46:53,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:53,598 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 601 transitions. [2021-12-21 20:46:53,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 9 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 20:46:53,598 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 601 transitions. [2021-12-21 20:46:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-21 20:46:53,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:53,600 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:53,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:53,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-21 20:46:53,817 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 703817343, now seen corresponding path program 1 times [2021-12-21 20:46:53,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:53,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223198784] [2021-12-21 20:46:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:53,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:53,823 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:53,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71537171] [2021-12-21 20:46:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:53,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:53,824 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:53,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-21 20:46:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:53,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 20:46:53,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 82 proven. 22 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-21 20:46:54,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:54,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223198784] [2021-12-21 20:46:54,328 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71537171] [2021-12-21 20:46:54,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71537171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:46:54,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:46:54,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-21 20:46:54,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316818214] [2021-12-21 20:46:54,329 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:54,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 20:46:54,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 20:46:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-12-21 20:46:54,329 INFO L87 Difference]: Start difference. First operand 508 states and 601 transitions. Second operand has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 20:46:56,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-21 20:46:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:56,858 INFO L93 Difference]: Finished difference Result 1053 states and 1314 transitions. [2021-12-21 20:46:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 20:46:56,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 119 [2021-12-21 20:46:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:56,861 INFO L225 Difference]: With dead ends: 1053 [2021-12-21 20:46:56,861 INFO L226 Difference]: Without dead ends: 715 [2021-12-21 20:46:56,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-12-21 20:46:56,862 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 82 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:56,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 911 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 888 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 20:46:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-12-21 20:46:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 612. [2021-12-21 20:46:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 476 states have (on average 1.1596638655462186) internal successors, (552), 477 states have internal predecessors, (552), 84 states have call successors, (84), 39 states have call predecessors, (84), 45 states have return successors, (108), 95 states have call predecessors, (108), 84 states have call successors, (108) [2021-12-21 20:46:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 744 transitions. [2021-12-21 20:46:56,879 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 744 transitions. Word has length 119 [2021-12-21 20:46:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:56,880 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 744 transitions. [2021-12-21 20:46:56,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 20:46:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 744 transitions. [2021-12-21 20:46:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-21 20:46:56,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:56,881 INFO L514 BasicCegarLoop]: trace histogram [12, 10, 7, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:56,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:57,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:57,096 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1295624958, now seen corresponding path program 2 times [2021-12-21 20:46:57,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:57,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772553791] [2021-12-21 20:46:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:57,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:57,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:57,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094876460] [2021-12-21 20:46:57,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:46:57,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:57,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:57,104 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:57,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-21 20:46:57,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:46:57,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:46:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 20:46:57,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 97 proven. 25 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-21 20:46:57,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 97 proven. 25 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-21 20:46:57,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772553791] [2021-12-21 20:46:57,446 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094876460] [2021-12-21 20:46:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094876460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:57,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:57,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-12-21 20:46:57,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308024580] [2021-12-21 20:46:57,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:57,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 20:46:57,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:57,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 20:46:57,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-21 20:46:57,449 INFO L87 Difference]: Start difference. First operand 612 states and 744 transitions. Second operand has 16 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 20:46:57,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:57,795 INFO L93 Difference]: Finished difference Result 1187 states and 1470 transitions. [2021-12-21 20:46:57,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 20:46:57,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 124 [2021-12-21 20:46:57,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:57,798 INFO L225 Difference]: With dead ends: 1187 [2021-12-21 20:46:57,798 INFO L226 Difference]: Without dead ends: 672 [2021-12-21 20:46:57,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-12-21 20:46:57,800 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 98 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:57,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 570 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:46:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-21 20:46:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 617. [2021-12-21 20:46:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 479 states have (on average 1.1565762004175366) internal successors, (554), 482 states have internal predecessors, (554), 85 states have call successors, (85), 40 states have call predecessors, (85), 46 states have return successors, (104), 94 states have call predecessors, (104), 85 states have call successors, (104) [2021-12-21 20:46:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 743 transitions. [2021-12-21 20:46:57,841 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 743 transitions. Word has length 124 [2021-12-21 20:46:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:57,841 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 743 transitions. [2021-12-21 20:46:57,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 8 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-21 20:46:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 743 transitions. [2021-12-21 20:46:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 20:46:57,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:57,843 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:57,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:58,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-21 20:46:58,044 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting binomialCoefficientErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1116473682, now seen corresponding path program 1 times [2021-12-21 20:46:58,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:58,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535511877] [2021-12-21 20:46:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:58,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:58,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:58,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032528876] [2021-12-21 20:46:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:58,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:58,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:58,056 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:58,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-21 20:46:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:46:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 20:46:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-21 20:46:58,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-12-21 20:46:58,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:58,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535511877] [2021-12-21 20:46:58,520 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:58,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032528876] [2021-12-21 20:46:58,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032528876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:58,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:58,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 20:46:58,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317289038] [2021-12-21 20:46:58,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:58,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 20:46:58,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 20:46:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-21 20:46:58,521 INFO L87 Difference]: Start difference. First operand 617 states and 743 transitions. Second operand has 14 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-21 20:46:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:58,689 INFO L93 Difference]: Finished difference Result 623 states and 744 transitions. [2021-12-21 20:46:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 20:46:58,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 125 [2021-12-21 20:46:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:58,691 INFO L225 Difference]: With dead ends: 623 [2021-12-21 20:46:58,691 INFO L226 Difference]: Without dead ends: 622 [2021-12-21 20:46:58,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-12-21 20:46:58,691 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 146 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:58,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 410 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-12-21 20:46:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 617. [2021-12-21 20:46:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 479 states have (on average 1.1524008350730688) internal successors, (552), 482 states have internal predecessors, (552), 85 states have call successors, (85), 40 states have call predecessors, (85), 46 states have return successors, (104), 94 states have call predecessors, (104), 85 states have call successors, (104) [2021-12-21 20:46:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 741 transitions. [2021-12-21 20:46:58,709 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 741 transitions. Word has length 125 [2021-12-21 20:46:58,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:58,709 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 741 transitions. [2021-12-21 20:46:58,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-21 20:46:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 741 transitions. [2021-12-21 20:46:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 20:46:58,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:58,710 INFO L514 BasicCegarLoop]: trace histogram [13, 10, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:58,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-21 20:46:58,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-21 20:46:58,926 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -282687370, now seen corresponding path program 2 times [2021-12-21 20:46:58,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:58,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607571206] [2021-12-21 20:46:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:58,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:58,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:58,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072037475] [2021-12-21 20:46:58,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:46:58,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:58,933 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:58,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-21 20:46:58,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:46:58,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:46:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 20:46:58,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:46:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 173 proven. 7 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-21 20:46:59,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:46:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 88 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-12-21 20:46:59,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:46:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607571206] [2021-12-21 20:46:59,374 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:46:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072037475] [2021-12-21 20:46:59,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072037475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:46:59,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:46:59,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-12-21 20:46:59,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642158859] [2021-12-21 20:46:59,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:46:59,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 20:46:59,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:46:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 20:46:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 20:46:59,376 INFO L87 Difference]: Start difference. First operand 617 states and 741 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 20:46:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:46:59,504 INFO L93 Difference]: Finished difference Result 1067 states and 1314 transitions. [2021-12-21 20:46:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 20:46:59,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 134 [2021-12-21 20:46:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:46:59,506 INFO L225 Difference]: With dead ends: 1067 [2021-12-21 20:46:59,506 INFO L226 Difference]: Without dead ends: 622 [2021-12-21 20:46:59,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-21 20:46:59,508 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 67 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:46:59,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 407 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:46:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-12-21 20:46:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 607. [2021-12-21 20:46:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 471 states have (on average 1.1507430997876857) internal successors, (542), 474 states have internal predecessors, (542), 84 states have call successors, (84), 40 states have call predecessors, (84), 45 states have return successors, (101), 92 states have call predecessors, (101), 84 states have call successors, (101) [2021-12-21 20:46:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 727 transitions. [2021-12-21 20:46:59,525 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 727 transitions. Word has length 134 [2021-12-21 20:46:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:46:59,526 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 727 transitions. [2021-12-21 20:46:59,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 8 states have internal predecessors, (57), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 20:46:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 727 transitions. [2021-12-21 20:46:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 20:46:59,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:46:59,527 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:46:59,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-21 20:46:59,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-21 20:46:59,743 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:46:59,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:46:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1601794137, now seen corresponding path program 3 times [2021-12-21 20:46:59,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:46:59,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100308741] [2021-12-21 20:46:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:46:59,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:46:59,748 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:46:59,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437932715] [2021-12-21 20:46:59,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:46:59,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:46:59,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:46:59,772 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:46:59,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-21 20:46:59,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 20:46:59,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:46:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 20:46:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 95 proven. 4 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-12-21 20:47:00,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:00,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:00,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100308741] [2021-12-21 20:47:00,413 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:00,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437932715] [2021-12-21 20:47:00,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437932715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:00,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:47:00,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-21 20:47:00,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560232091] [2021-12-21 20:47:00,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:00,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 20:47:00,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 20:47:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-21 20:47:00,414 INFO L87 Difference]: Start difference. First operand 607 states and 727 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 20:47:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:00,575 INFO L93 Difference]: Finished difference Result 692 states and 865 transitions. [2021-12-21 20:47:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:47:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 143 [2021-12-21 20:47:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:00,578 INFO L225 Difference]: With dead ends: 692 [2021-12-21 20:47:00,578 INFO L226 Difference]: Without dead ends: 691 [2021-12-21 20:47:00,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-21 20:47:00,579 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:00,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 200 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-12-21 20:47:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 633. [2021-12-21 20:47:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 492 states have (on average 1.1443089430894309) internal successors, (563), 494 states have internal predecessors, (563), 84 states have call successors, (84), 40 states have call predecessors, (84), 50 states have return successors, (113), 98 states have call predecessors, (113), 84 states have call successors, (113) [2021-12-21 20:47:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 760 transitions. [2021-12-21 20:47:00,604 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 760 transitions. Word has length 143 [2021-12-21 20:47:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:00,604 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 760 transitions. [2021-12-21 20:47:00,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 20:47:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 760 transitions. [2021-12-21 20:47:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-21 20:47:00,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:00,605 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 9, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:00,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:00,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-21 20:47:00,821 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:00,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1543267888, now seen corresponding path program 1 times [2021-12-21 20:47:00,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:00,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010200187] [2021-12-21 20:47:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:00,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:00,829 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:00,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115252338] [2021-12-21 20:47:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:00,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:00,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:00,830 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:00,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-21 20:47:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 20:47:00,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 103 proven. 26 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-21 20:47:01,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 103 proven. 27 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-12-21 20:47:01,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:01,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010200187] [2021-12-21 20:47:01,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:01,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115252338] [2021-12-21 20:47:01,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115252338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:01,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:01,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-12-21 20:47:01,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735285292] [2021-12-21 20:47:01,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:01,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 20:47:01,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 20:47:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-21 20:47:01,502 INFO L87 Difference]: Start difference. First operand 633 states and 760 transitions. Second operand has 15 states, 13 states have (on average 5.384615384615385) internal successors, (70), 15 states have internal predecessors, (70), 9 states have call successors, (13), 1 states have call predecessors, (13), 4 states have return successors, (13), 6 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-21 20:47:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:01,733 INFO L93 Difference]: Finished difference Result 1341 states and 1694 transitions. [2021-12-21 20:47:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 20:47:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.384615384615385) internal successors, (70), 15 states have internal predecessors, (70), 9 states have call successors, (13), 1 states have call predecessors, (13), 4 states have return successors, (13), 6 states have call predecessors, (13), 9 states have call successors, (13) Word has length 146 [2021-12-21 20:47:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:01,738 INFO L225 Difference]: With dead ends: 1341 [2021-12-21 20:47:01,738 INFO L226 Difference]: Without dead ends: 777 [2021-12-21 20:47:01,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 276 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-12-21 20:47:01,741 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 79 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:01,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 321 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:47:01,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-12-21 20:47:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 680. [2021-12-21 20:47:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 528 states have (on average 1.143939393939394) internal successors, (604), 528 states have internal predecessors, (604), 91 states have call successors, (91), 40 states have call predecessors, (91), 54 states have return successors, (126), 111 states have call predecessors, (126), 89 states have call successors, (126) [2021-12-21 20:47:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 821 transitions. [2021-12-21 20:47:01,796 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 821 transitions. Word has length 146 [2021-12-21 20:47:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:01,797 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 821 transitions. [2021-12-21 20:47:01,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.384615384615385) internal successors, (70), 15 states have internal predecessors, (70), 9 states have call successors, (13), 1 states have call predecessors, (13), 4 states have return successors, (13), 6 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-21 20:47:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 821 transitions. [2021-12-21 20:47:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-21 20:47:01,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:01,798 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 9, 7, 7, 7, 7, 7, 7, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:01,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:02,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-21 20:47:02,011 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:02,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -775399783, now seen corresponding path program 4 times [2021-12-21 20:47:02,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:02,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780133753] [2021-12-21 20:47:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:02,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:02,017 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:02,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134389870] [2021-12-21 20:47:02,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 20:47:02,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:02,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:02,023 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:02,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-21 20:47:02,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 20:47:02,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:02,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 20:47:02,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 238 proven. 99 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-12-21 20:47:02,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 238 proven. 106 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-12-21 20:47:02,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:02,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780133753] [2021-12-21 20:47:02,724 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:02,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134389870] [2021-12-21 20:47:02,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134389870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:02,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:02,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 21 [2021-12-21 20:47:02,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314974365] [2021-12-21 20:47:02,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:02,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 20:47:02,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 20:47:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-12-21 20:47:02,726 INFO L87 Difference]: Start difference. First operand 680 states and 821 transitions. Second operand has 21 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 12 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2021-12-21 20:47:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:03,294 INFO L93 Difference]: Finished difference Result 1464 states and 1866 transitions. [2021-12-21 20:47:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 20:47:03,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 12 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) Word has length 163 [2021-12-21 20:47:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:03,297 INFO L225 Difference]: With dead ends: 1464 [2021-12-21 20:47:03,297 INFO L226 Difference]: Without dead ends: 878 [2021-12-21 20:47:03,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 20:47:03,299 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 238 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:03,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 400 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 20:47:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-21 20:47:03,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 714. [2021-12-21 20:47:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 552 states have (on average 1.1358695652173914) internal successors, (627), 556 states have internal predecessors, (627), 98 states have call successors, (98), 44 states have call predecessors, (98), 57 states have return successors, (147), 113 states have call predecessors, (147), 98 states have call successors, (147) [2021-12-21 20:47:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 872 transitions. [2021-12-21 20:47:03,324 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 872 transitions. Word has length 163 [2021-12-21 20:47:03,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:03,325 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 872 transitions. [2021-12-21 20:47:03,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 12 states have call successors, (19), 3 states have call predecessors, (19), 6 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2021-12-21 20:47:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 872 transitions. [2021-12-21 20:47:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 20:47:03,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:03,326 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:03,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-21 20:47:03,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:03,543 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -916356688, now seen corresponding path program 2 times [2021-12-21 20:47:03,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:03,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849297346] [2021-12-21 20:47:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:03,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:03,548 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:03,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046037749] [2021-12-21 20:47:03,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:47:03,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:03,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:03,556 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:03,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-21 20:47:03,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:47:03,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:03,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 20:47:03,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-12-21 20:47:03,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-12-21 20:47:04,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849297346] [2021-12-21 20:47:04,151 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:04,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046037749] [2021-12-21 20:47:04,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046037749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:04,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:04,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 20:47:04,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694588008] [2021-12-21 20:47:04,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:04,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 20:47:04,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:04,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 20:47:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-21 20:47:04,153 INFO L87 Difference]: Start difference. First operand 714 states and 872 transitions. Second operand has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-21 20:47:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:04,286 INFO L93 Difference]: Finished difference Result 903 states and 1126 transitions. [2021-12-21 20:47:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 20:47:04,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 156 [2021-12-21 20:47:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:04,290 INFO L225 Difference]: With dead ends: 903 [2021-12-21 20:47:04,290 INFO L226 Difference]: Without dead ends: 902 [2021-12-21 20:47:04,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-21 20:47:04,292 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 76 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:04,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 283 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-12-21 20:47:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 842. [2021-12-21 20:47:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 657 states have (on average 1.1506849315068493) internal successors, (756), 664 states have internal predecessors, (756), 121 states have call successors, (121), 44 states have call predecessors, (121), 57 states have return successors, (170), 133 states have call predecessors, (170), 121 states have call successors, (170) [2021-12-21 20:47:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1047 transitions. [2021-12-21 20:47:04,341 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1047 transitions. Word has length 156 [2021-12-21 20:47:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:04,343 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1047 transitions. [2021-12-21 20:47:04,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-21 20:47:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1047 transitions. [2021-12-21 20:47:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 20:47:04,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:04,344 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 10, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:04,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:04,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-21 20:47:04,560 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1546466844, now seen corresponding path program 3 times [2021-12-21 20:47:04,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:04,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416480849] [2021-12-21 20:47:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:04,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:04,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:04,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284006460] [2021-12-21 20:47:04,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:47:04,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:04,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:04,570 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:04,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-21 20:47:04,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 20:47:04,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:04,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 20:47:04,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2021-12-21 20:47:04,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2021-12-21 20:47:05,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:05,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416480849] [2021-12-21 20:47:05,086 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:05,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284006460] [2021-12-21 20:47:05,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284006460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:05,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:05,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-21 20:47:05,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639094391] [2021-12-21 20:47:05,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:05,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 20:47:05,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:05,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 20:47:05,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-21 20:47:05,087 INFO L87 Difference]: Start difference. First operand 842 states and 1047 transitions. Second operand has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 20:47:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:05,361 INFO L93 Difference]: Finished difference Result 949 states and 1201 transitions. [2021-12-21 20:47:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 20:47:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 166 [2021-12-21 20:47:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:05,364 INFO L225 Difference]: With dead ends: 949 [2021-12-21 20:47:05,364 INFO L226 Difference]: Without dead ends: 948 [2021-12-21 20:47:05,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-12-21 20:47:05,365 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 137 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:05,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 543 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:47:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-12-21 20:47:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 931. [2021-12-21 20:47:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 726 states have (on average 1.1528925619834711) internal successors, (837), 731 states have internal predecessors, (837), 132 states have call successors, (132), 49 states have call predecessors, (132), 66 states have return successors, (194), 150 states have call predecessors, (194), 132 states have call successors, (194) [2021-12-21 20:47:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1163 transitions. [2021-12-21 20:47:05,393 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1163 transitions. Word has length 166 [2021-12-21 20:47:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:05,394 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1163 transitions. [2021-12-21 20:47:05,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 12 states have internal predecessors, (65), 7 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 20:47:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1163 transitions. [2021-12-21 20:47:05,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-21 20:47:05,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:05,395 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:05,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:05,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:05,611 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting binomialCoefficientErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1319903796, now seen corresponding path program 2 times [2021-12-21 20:47:05,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:05,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170435101] [2021-12-21 20:47:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:05,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:05,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:05,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610140363] [2021-12-21 20:47:05,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:47:05,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:05,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:05,621 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:05,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-21 20:47:05,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:47:05,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 20:47:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-12-21 20:47:05,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:47:05,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:05,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170435101] [2021-12-21 20:47:05,918 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:05,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610140363] [2021-12-21 20:47:05,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610140363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:05,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:05,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 20:47:05,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142893550] [2021-12-21 20:47:05,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:05,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 20:47:05,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:05,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 20:47:05,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 20:47:05,920 INFO L87 Difference]: Start difference. First operand 931 states and 1163 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-21 20:47:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:06,131 INFO L93 Difference]: Finished difference Result 1743 states and 2237 transitions. [2021-12-21 20:47:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 20:47:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 169 [2021-12-21 20:47:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:06,136 INFO L225 Difference]: With dead ends: 1743 [2021-12-21 20:47:06,136 INFO L226 Difference]: Without dead ends: 1024 [2021-12-21 20:47:06,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-12-21 20:47:06,139 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 54 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:06,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 252 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-12-21 20:47:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 933. [2021-12-21 20:47:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 727 states have (on average 1.1526822558459422) internal successors, (838), 733 states have internal predecessors, (838), 132 states have call successors, (132), 49 states have call predecessors, (132), 67 states have return successors, (209), 150 states have call predecessors, (209), 132 states have call successors, (209) [2021-12-21 20:47:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1179 transitions. [2021-12-21 20:47:06,176 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1179 transitions. Word has length 169 [2021-12-21 20:47:06,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:06,177 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 1179 transitions. [2021-12-21 20:47:06,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 5 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-21 20:47:06,177 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1179 transitions. [2021-12-21 20:47:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-21 20:47:06,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:06,178 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 11, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:06,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:06,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-21 20:47:06,401 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting binomialCoefficientErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash 308290772, now seen corresponding path program 3 times [2021-12-21 20:47:06,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:06,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091491887] [2021-12-21 20:47:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:06,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:06,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:06,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426372549] [2021-12-21 20:47:06,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:47:06,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:06,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:06,410 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:06,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-21 20:47:06,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 20:47:06,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 20:47:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-12-21 20:47:06,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-12-21 20:47:06,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091491887] [2021-12-21 20:47:06,832 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426372549] [2021-12-21 20:47:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426372549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:06,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:06,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-12-21 20:47:06,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230985146] [2021-12-21 20:47:06,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:06,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 20:47:06,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 20:47:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-21 20:47:06,834 INFO L87 Difference]: Start difference. First operand 933 states and 1179 transitions. Second operand has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 12 states have internal predecessors, (79), 9 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-21 20:47:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:06,963 INFO L93 Difference]: Finished difference Result 935 states and 1179 transitions. [2021-12-21 20:47:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 20:47:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 12 states have internal predecessors, (79), 9 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 179 [2021-12-21 20:47:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:06,983 INFO L225 Difference]: With dead ends: 935 [2021-12-21 20:47:06,983 INFO L226 Difference]: Without dead ends: 934 [2021-12-21 20:47:06,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-21 20:47:06,984 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 81 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:06,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 507 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-12-21 20:47:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 933. [2021-12-21 20:47:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 727 states have (on average 1.141678129298487) internal successors, (830), 733 states have internal predecessors, (830), 132 states have call successors, (132), 49 states have call predecessors, (132), 67 states have return successors, (209), 150 states have call predecessors, (209), 132 states have call successors, (209) [2021-12-21 20:47:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1171 transitions. [2021-12-21 20:47:07,054 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1171 transitions. Word has length 179 [2021-12-21 20:47:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:07,055 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 1171 transitions. [2021-12-21 20:47:07,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.076923076923077) internal successors, (79), 12 states have internal predecessors, (79), 9 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-21 20:47:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1171 transitions. [2021-12-21 20:47:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-21 20:47:07,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:07,056 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 10, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:07,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-21 20:47:07,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-21 20:47:07,268 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash 252749190, now seen corresponding path program 4 times [2021-12-21 20:47:07,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417605516] [2021-12-21 20:47:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:07,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:07,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108524015] [2021-12-21 20:47:07,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 20:47:07,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:07,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:07,300 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:07,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-21 20:47:07,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 20:47:07,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:07,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 20:47:07,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 217 proven. 31 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2021-12-21 20:47:07,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 217 proven. 32 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-12-21 20:47:07,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417605516] [2021-12-21 20:47:07,877 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:07,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108524015] [2021-12-21 20:47:07,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108524015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:07,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:07,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 17 [2021-12-21 20:47:07,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653237994] [2021-12-21 20:47:07,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:07,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 20:47:07,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 20:47:07,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-21 20:47:07,896 INFO L87 Difference]: Start difference. First operand 933 states and 1171 transitions. Second operand has 17 states, 13 states have (on average 6.615384615384615) internal successors, (86), 16 states have internal predecessors, (86), 10 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-21 20:47:08,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:08,164 INFO L93 Difference]: Finished difference Result 1881 states and 2490 transitions. [2021-12-21 20:47:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 20:47:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 6.615384615384615) internal successors, (86), 16 states have internal predecessors, (86), 10 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) Word has length 176 [2021-12-21 20:47:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:08,169 INFO L225 Difference]: With dead ends: 1881 [2021-12-21 20:47:08,170 INFO L226 Difference]: Without dead ends: 1204 [2021-12-21 20:47:08,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-12-21 20:47:08,172 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 144 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:08,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 697 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:47:08,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-12-21 20:47:08,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1138. [2021-12-21 20:47:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 887 states have (on average 1.153325817361894) internal successors, (1023), 890 states have internal predecessors, (1023), 170 states have call successors, (170), 55 states have call predecessors, (170), 74 states have return successors, (283), 192 states have call predecessors, (283), 170 states have call successors, (283) [2021-12-21 20:47:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1476 transitions. [2021-12-21 20:47:08,253 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1476 transitions. Word has length 176 [2021-12-21 20:47:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:08,253 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1476 transitions. [2021-12-21 20:47:08,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 6.615384615384615) internal successors, (86), 16 states have internal predecessors, (86), 10 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-21 20:47:08,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1476 transitions. [2021-12-21 20:47:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-21 20:47:08,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:08,254 INFO L514 BasicCegarLoop]: trace histogram [20, 17, 10, 10, 10, 10, 10, 8, 8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:08,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:08,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-21 20:47:08,479 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:08,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:08,480 INFO L85 PathProgramCache]: Analyzing trace with hash 220180665, now seen corresponding path program 5 times [2021-12-21 20:47:08,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:08,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498443109] [2021-12-21 20:47:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:08,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:08,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:08,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248907813] [2021-12-21 20:47:08,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 20:47:08,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:08,500 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:08,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-21 20:47:08,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-21 20:47:08,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-21 20:47:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 552 proven. 105 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-12-21 20:47:08,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 940 backedges. 329 proven. 236 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-12-21 20:47:09,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498443109] [2021-12-21 20:47:09,705 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248907813] [2021-12-21 20:47:09,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248907813] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:09,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:09,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 25 [2021-12-21 20:47:09,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285372070] [2021-12-21 20:47:09,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:09,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 20:47:09,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 20:47:09,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-12-21 20:47:09,709 INFO L87 Difference]: Start difference. First operand 1138 states and 1476 transitions. Second operand has 25 states, 21 states have (on average 5.428571428571429) internal successors, (114), 25 states have internal predecessors, (114), 16 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (25), 13 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-21 20:47:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:10,664 INFO L93 Difference]: Finished difference Result 2712 states and 3813 transitions. [2021-12-21 20:47:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 20:47:10,665 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 5.428571428571429) internal successors, (114), 25 states have internal predecessors, (114), 16 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (25), 13 states have call predecessors, (25), 16 states have call successors, (25) Word has length 203 [2021-12-21 20:47:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:10,671 INFO L225 Difference]: With dead ends: 2712 [2021-12-21 20:47:10,672 INFO L226 Difference]: Without dead ends: 1644 [2021-12-21 20:47:10,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 20:47:10,676 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 338 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:10,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 792 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 20:47:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-12-21 20:47:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1390. [2021-12-21 20:47:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1079 states have (on average 1.1390176088971269) internal successors, (1229), 1093 states have internal predecessors, (1229), 215 states have call successors, (215), 61 states have call predecessors, (215), 89 states have return successors, (459), 235 states have call predecessors, (459), 215 states have call successors, (459) [2021-12-21 20:47:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1903 transitions. [2021-12-21 20:47:10,742 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1903 transitions. Word has length 203 [2021-12-21 20:47:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:10,743 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 1903 transitions. [2021-12-21 20:47:10,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 5.428571428571429) internal successors, (114), 25 states have internal predecessors, (114), 16 states have call successors, (27), 2 states have call predecessors, (27), 7 states have return successors, (25), 13 states have call predecessors, (25), 16 states have call successors, (25) [2021-12-21 20:47:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1903 transitions. [2021-12-21 20:47:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-21 20:47:10,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:10,744 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 12, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:10,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:10,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-21 20:47:10,962 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting binomialCoefficientErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:10,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:10,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1231172729, now seen corresponding path program 1 times [2021-12-21 20:47:10,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:10,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849826368] [2021-12-21 20:47:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:10,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:10,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:10,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574842442] [2021-12-21 20:47:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:10,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:10,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:10,970 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:10,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-21 20:47:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 20:47:11,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked. [2021-12-21 20:47:11,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:47:11,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849826368] [2021-12-21 20:47:11,312 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:11,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574842442] [2021-12-21 20:47:11,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574842442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:11,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:11,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:47:11,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46798741] [2021-12-21 20:47:11,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:11,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:47:11,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:47:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:11,314 INFO L87 Difference]: Start difference. First operand 1390 states and 1903 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 20:47:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:11,367 INFO L93 Difference]: Finished difference Result 1497 states and 2025 transitions. [2021-12-21 20:47:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 197 [2021-12-21 20:47:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:11,373 INFO L225 Difference]: With dead ends: 1497 [2021-12-21 20:47:11,373 INFO L226 Difference]: Without dead ends: 1494 [2021-12-21 20:47:11,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:11,374 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:11,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 187 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:11,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-12-21 20:47:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1398. [2021-12-21 20:47:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1087 states have (on average 1.137994480220791) internal successors, (1237), 1097 states have internal predecessors, (1237), 215 states have call successors, (215), 61 states have call predecessors, (215), 89 states have return successors, (457), 239 states have call predecessors, (457), 215 states have call successors, (457) [2021-12-21 20:47:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 1909 transitions. [2021-12-21 20:47:11,435 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 1909 transitions. Word has length 197 [2021-12-21 20:47:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:11,435 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 1909 transitions. [2021-12-21 20:47:11,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 20:47:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 1909 transitions. [2021-12-21 20:47:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-21 20:47:11,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:11,437 INFO L514 BasicCegarLoop]: trace histogram [21, 18, 11, 11, 11, 11, 10, 9, 9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:11,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:11,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-21 20:47:11,651 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:11,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2037013593, now seen corresponding path program 6 times [2021-12-21 20:47:11,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:11,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487643677] [2021-12-21 20:47:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:11,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:11,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:11,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16482465] [2021-12-21 20:47:11,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 20:47:11,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:11,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:11,660 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:11,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-21 20:47:11,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-21 20:47:11,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:11,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 20:47:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 246 proven. 18 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-12-21 20:47:12,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:12,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:12,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487643677] [2021-12-21 20:47:12,562 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:12,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16482465] [2021-12-21 20:47:12,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16482465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:12,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:47:12,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-21 20:47:12,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211958581] [2021-12-21 20:47:12,563 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:12,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 20:47:12,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:12,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 20:47:12,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-21 20:47:12,564 INFO L87 Difference]: Start difference. First operand 1398 states and 1909 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 20:47:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:12,814 INFO L93 Difference]: Finished difference Result 1464 states and 2043 transitions. [2021-12-21 20:47:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 20:47:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 213 [2021-12-21 20:47:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:12,819 INFO L225 Difference]: With dead ends: 1464 [2021-12-21 20:47:12,819 INFO L226 Difference]: Without dead ends: 1463 [2021-12-21 20:47:12,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-12-21 20:47:12,821 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 25 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:12,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 248 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-12-21 20:47:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-12-21 20:47:12,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1433. [2021-12-21 20:47:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1117 states have (on average 1.134288272157565) internal successors, (1267), 1122 states have internal predecessors, (1267), 215 states have call successors, (215), 61 states have call predecessors, (215), 94 states have return successors, (470), 249 states have call predecessors, (470), 215 states have call successors, (470) [2021-12-21 20:47:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1952 transitions. [2021-12-21 20:47:12,871 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1952 transitions. Word has length 213 [2021-12-21 20:47:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:12,872 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 1952 transitions. [2021-12-21 20:47:12,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 20:47:12,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1952 transitions. [2021-12-21 20:47:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-21 20:47:12,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:12,873 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 12, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:12,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:13,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-21 20:47:13,088 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting binomialCoefficientErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash 611678105, now seen corresponding path program 2 times [2021-12-21 20:47:13,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:13,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102757290] [2021-12-21 20:47:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:13,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:13,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:13,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316521218] [2021-12-21 20:47:13,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:47:13,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:13,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:13,096 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:13,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-21 20:47:13,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:47:13,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:13,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 20:47:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 122 proven. 21 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2021-12-21 20:47:13,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 122 proven. 21 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2021-12-21 20:47:13,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:13,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102757290] [2021-12-21 20:47:13,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:13,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316521218] [2021-12-21 20:47:13,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316521218] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:13,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:13,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-12-21 20:47:13,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578897391] [2021-12-21 20:47:13,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:13,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 20:47:13,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 20:47:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-21 20:47:13,727 INFO L87 Difference]: Start difference. First operand 1433 states and 1952 transitions. Second operand has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 9 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-21 20:47:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:14,184 INFO L93 Difference]: Finished difference Result 2647 states and 3687 transitions. [2021-12-21 20:47:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 20:47:14,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 9 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 207 [2021-12-21 20:47:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:14,189 INFO L225 Difference]: With dead ends: 2647 [2021-12-21 20:47:14,189 INFO L226 Difference]: Without dead ends: 1463 [2021-12-21 20:47:14,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-12-21 20:47:14,194 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 121 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:14,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 567 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 20:47:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-12-21 20:47:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 1386. [2021-12-21 20:47:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1079 states have (on average 1.1390176088971269) internal successors, (1229), 1086 states have internal predecessors, (1229), 209 states have call successors, (209), 62 states have call predecessors, (209), 91 states have return successors, (389), 237 states have call predecessors, (389), 208 states have call successors, (389) [2021-12-21 20:47:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 1827 transitions. [2021-12-21 20:47:14,257 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 1827 transitions. Word has length 207 [2021-12-21 20:47:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:14,257 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 1827 transitions. [2021-12-21 20:47:14,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.277777777777778) internal successors, (77), 16 states have internal predecessors, (77), 9 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-21 20:47:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 1827 transitions. [2021-12-21 20:47:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-21 20:47:14,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:14,259 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:14,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:14,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-21 20:47:14,473 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:14,473 INFO L85 PathProgramCache]: Analyzing trace with hash 502851865, now seen corresponding path program 7 times [2021-12-21 20:47:14,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:14,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794307703] [2021-12-21 20:47:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:14,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:14,480 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:14,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151250237] [2021-12-21 20:47:14,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 20:47:14,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:14,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:14,481 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:14,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-21 20:47:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:14,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 20:47:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 336 proven. 51 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-12-21 20:47:14,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 336 proven. 57 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2021-12-21 20:47:15,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794307703] [2021-12-21 20:47:15,153 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:15,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151250237] [2021-12-21 20:47:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151250237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:15,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:15,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 20 [2021-12-21 20:47:15,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810984835] [2021-12-21 20:47:15,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:15,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 20:47:15,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 20:47:15,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-21 20:47:15,154 INFO L87 Difference]: Start difference. First operand 1386 states and 1827 transitions. Second operand has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 11 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-21 20:47:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:15,643 INFO L93 Difference]: Finished difference Result 2938 states and 3976 transitions. [2021-12-21 20:47:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 20:47:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 11 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) Word has length 213 [2021-12-21 20:47:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:15,661 INFO L225 Difference]: With dead ends: 2938 [2021-12-21 20:47:15,661 INFO L226 Difference]: Without dead ends: 1667 [2021-12-21 20:47:15,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-12-21 20:47:15,667 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 101 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:15,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 768 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 20:47:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-12-21 20:47:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1581. [2021-12-21 20:47:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1228 states have (on average 1.1351791530944626) internal successors, (1394), 1232 states have internal predecessors, (1394), 239 states have call successors, (239), 71 states have call predecessors, (239), 107 states have return successors, (453), 277 states have call predecessors, (453), 238 states have call successors, (453) [2021-12-21 20:47:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2086 transitions. [2021-12-21 20:47:15,723 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2086 transitions. Word has length 213 [2021-12-21 20:47:15,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:15,724 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 2086 transitions. [2021-12-21 20:47:15,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 11 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-21 20:47:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2086 transitions. [2021-12-21 20:47:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-21 20:47:15,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:15,725 INFO L514 BasicCegarLoop]: trace histogram [22, 19, 11, 11, 11, 11, 11, 9, 9, 8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:15,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:15,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:15,941 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:15,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1483060659, now seen corresponding path program 3 times [2021-12-21 20:47:15,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:15,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082794386] [2021-12-21 20:47:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:15,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:15,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:15,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042248419] [2021-12-21 20:47:15,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:47:15,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:15,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:15,960 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:15,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-21 20:47:16,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 20:47:16,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:16,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 20:47:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 319 proven. 40 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2021-12-21 20:47:16,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:17,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:17,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082794386] [2021-12-21 20:47:17,890 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:17,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042248419] [2021-12-21 20:47:17,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042248419] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:17,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:47:17,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-21 20:47:17,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702428142] [2021-12-21 20:47:17,890 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 20:47:17,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 20:47:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-21 20:47:17,891 INFO L87 Difference]: Start difference. First operand 1581 states and 2086 transitions. Second operand has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 4 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 20:47:19,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:19,063 INFO L93 Difference]: Finished difference Result 1695 states and 2340 transitions. [2021-12-21 20:47:19,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 20:47:19,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 4 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 224 [2021-12-21 20:47:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:19,068 INFO L225 Difference]: With dead ends: 1695 [2021-12-21 20:47:19,068 INFO L226 Difference]: Without dead ends: 1694 [2021-12-21 20:47:19,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-12-21 20:47:19,069 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 58 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:19,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 362 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 20:47:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-12-21 20:47:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1606. [2021-12-21 20:47:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1248 states have (on average 1.1330128205128205) internal successors, (1414), 1252 states have internal predecessors, (1414), 239 states have call successors, (239), 71 states have call predecessors, (239), 112 states have return successors, (466), 282 states have call predecessors, (466), 238 states have call successors, (466) [2021-12-21 20:47:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2119 transitions. [2021-12-21 20:47:19,127 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2119 transitions. Word has length 224 [2021-12-21 20:47:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:19,127 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2119 transitions. [2021-12-21 20:47:19,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 4 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 20:47:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2119 transitions. [2021-12-21 20:47:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-21 20:47:19,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:19,128 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 11, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:19,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:19,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-21 20:47:19,345 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:19,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -639257203, now seen corresponding path program 4 times [2021-12-21 20:47:19,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:19,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334051511] [2021-12-21 20:47:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:19,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:19,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:19,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413712385] [2021-12-21 20:47:19,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 20:47:19,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:19,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:19,356 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:19,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-21 20:47:19,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 20:47:19,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:19,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 20:47:19,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 251 proven. 141 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-12-21 20:47:19,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 251 proven. 142 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2021-12-21 20:47:20,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:20,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334051511] [2021-12-21 20:47:20,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:20,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413712385] [2021-12-21 20:47:20,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413712385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:20,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:20,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 18 [2021-12-21 20:47:20,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89570097] [2021-12-21 20:47:20,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:20,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 20:47:20,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:20,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 20:47:20,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-12-21 20:47:20,386 INFO L87 Difference]: Start difference. First operand 1606 states and 2119 transitions. Second operand has 18 states, 15 states have (on average 5.933333333333334) internal successors, (89), 17 states have internal predecessors, (89), 10 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-21 20:47:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:20,938 INFO L93 Difference]: Finished difference Result 3807 states and 5288 transitions. [2021-12-21 20:47:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 20:47:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.933333333333334) internal successors, (89), 17 states have internal predecessors, (89), 10 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 224 [2021-12-21 20:47:20,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:20,967 INFO L225 Difference]: With dead ends: 3807 [2021-12-21 20:47:20,967 INFO L226 Difference]: Without dead ends: 2482 [2021-12-21 20:47:20,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-12-21 20:47:20,971 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 274 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:20,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 394 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 20:47:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-12-21 20:47:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2029. [2021-12-21 20:47:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 1575 states have (on average 1.1377777777777778) internal successors, (1792), 1574 states have internal predecessors, (1792), 318 states have call successors, (318), 84 states have call predecessors, (318), 129 states have return successors, (659), 370 states have call predecessors, (659), 317 states have call successors, (659) [2021-12-21 20:47:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 2769 transitions. [2021-12-21 20:47:21,045 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 2769 transitions. Word has length 224 [2021-12-21 20:47:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:21,045 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 2769 transitions. [2021-12-21 20:47:21,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.933333333333334) internal successors, (89), 17 states have internal predecessors, (89), 10 states have call successors, (17), 3 states have call predecessors, (17), 5 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2021-12-21 20:47:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 2769 transitions. [2021-12-21 20:47:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-21 20:47:21,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:21,047 INFO L514 BasicCegarLoop]: trace histogram [24, 21, 12, 12, 12, 12, 12, 10, 10, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:21,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:21,264 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1875748746, now seen corresponding path program 5 times [2021-12-21 20:47:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:21,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860918247] [2021-12-21 20:47:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:21,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:21,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:21,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493437360] [2021-12-21 20:47:21,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 20:47:21,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:21,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:21,272 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:21,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-21 20:47:21,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-21 20:47:21,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:21,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 20:47:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 682 proven. 0 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-12-21 20:47:21,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:47:21,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:21,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860918247] [2021-12-21 20:47:21,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:21,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493437360] [2021-12-21 20:47:21,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493437360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:21,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:21,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 20:47:21,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155674410] [2021-12-21 20:47:21,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:21,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 20:47:21,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 20:47:21,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 20:47:21,748 INFO L87 Difference]: Start difference. First operand 2029 states and 2769 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 20:47:22,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:22,026 INFO L93 Difference]: Finished difference Result 3578 states and 4977 transitions. [2021-12-21 20:47:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 20:47:22,027 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 242 [2021-12-21 20:47:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:22,032 INFO L225 Difference]: With dead ends: 3578 [2021-12-21 20:47:22,032 INFO L226 Difference]: Without dead ends: 1970 [2021-12-21 20:47:22,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-12-21 20:47:22,038 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 47 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:22,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 334 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-12-21 20:47:22,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1959. [2021-12-21 20:47:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1525 states have (on average 1.1383606557377048) internal successors, (1736), 1522 states have internal predecessors, (1736), 302 states have call successors, (302), 82 states have call predecessors, (302), 125 states have return successors, (591), 354 states have call predecessors, (591), 302 states have call successors, (591) [2021-12-21 20:47:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 2629 transitions. [2021-12-21 20:47:22,111 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 2629 transitions. Word has length 242 [2021-12-21 20:47:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:22,112 INFO L470 AbstractCegarLoop]: Abstraction has 1959 states and 2629 transitions. [2021-12-21 20:47:22,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-21 20:47:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 2629 transitions. [2021-12-21 20:47:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-12-21 20:47:22,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:22,122 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 14, 14, 14, 14, 14, 14, 13, 13, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:22,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:22,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:22,340 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1842717523, now seen corresponding path program 8 times [2021-12-21 20:47:22,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:22,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489641896] [2021-12-21 20:47:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:22,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:22,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:22,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296979804] [2021-12-21 20:47:22,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:47:22,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:22,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:22,352 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:22,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-21 20:47:22,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:47:22,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:22,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 20:47:22,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 495 proven. 68 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2021-12-21 20:47:22,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 495 proven. 74 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2021-12-21 20:47:23,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489641896] [2021-12-21 20:47:23,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:23,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296979804] [2021-12-21 20:47:23,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296979804] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:23,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:23,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 30 [2021-12-21 20:47:23,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229576556] [2021-12-21 20:47:23,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:23,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 20:47:23,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:23,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 20:47:23,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-12-21 20:47:23,731 INFO L87 Difference]: Start difference. First operand 1959 states and 2629 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 27 states have internal predecessors, (111), 16 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (20), 13 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-21 20:47:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:24,612 INFO L93 Difference]: Finished difference Result 4235 states and 5767 transitions. [2021-12-21 20:47:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-21 20:47:24,614 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 27 states have internal predecessors, (111), 16 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (20), 13 states have call predecessors, (20), 14 states have call successors, (20) Word has length 267 [2021-12-21 20:47:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:24,634 INFO L225 Difference]: With dead ends: 4235 [2021-12-21 20:47:24,647 INFO L226 Difference]: Without dead ends: 2420 [2021-12-21 20:47:24,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=2030, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 20:47:24,654 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 200 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:24,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 791 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 20:47:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-12-21 20:47:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2342. [2021-12-21 20:47:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 1837 states have (on average 1.1486118671747414) internal successors, (2110), 1824 states have internal predecessors, (2110), 356 states have call successors, (356), 96 states have call predecessors, (356), 142 states have return successors, (684), 421 states have call predecessors, (684), 356 states have call successors, (684) [2021-12-21 20:47:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 3150 transitions. [2021-12-21 20:47:24,749 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 3150 transitions. Word has length 267 [2021-12-21 20:47:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:24,749 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 3150 transitions. [2021-12-21 20:47:24,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 27 states have internal predecessors, (111), 16 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (20), 13 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-21 20:47:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 3150 transitions. [2021-12-21 20:47:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-21 20:47:24,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:24,751 INFO L514 BasicCegarLoop]: trace histogram [25, 22, 13, 13, 13, 13, 12, 11, 11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:24,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:24,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-21 20:47:24,965 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:24,965 INFO L85 PathProgramCache]: Analyzing trace with hash 975038634, now seen corresponding path program 6 times [2021-12-21 20:47:24,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:24,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389933330] [2021-12-21 20:47:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:24,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:24,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:24,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694337004] [2021-12-21 20:47:24,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 20:47:24,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:24,973 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:24,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-21 20:47:25,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-21 20:47:25,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:25,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 20:47:25,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 723 proven. 20 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-12-21 20:47:25,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 215 proven. 86 refuted. 0 times theorem prover too weak. 1249 trivial. 0 not checked. [2021-12-21 20:47:25,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:25,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389933330] [2021-12-21 20:47:25,867 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:25,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694337004] [2021-12-21 20:47:25,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694337004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:25,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:25,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-12-21 20:47:25,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064805215] [2021-12-21 20:47:25,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:25,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 20:47:25,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:25,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 20:47:25,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-21 20:47:25,869 INFO L87 Difference]: Start difference. First operand 2342 states and 3150 transitions. Second operand has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 18 states have internal predecessors, (100), 12 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-21 20:47:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:26,437 INFO L93 Difference]: Finished difference Result 5093 states and 7057 transitions. [2021-12-21 20:47:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-21 20:47:26,438 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 18 states have internal predecessors, (100), 12 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 252 [2021-12-21 20:47:26,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:26,457 INFO L225 Difference]: With dead ends: 5093 [2021-12-21 20:47:26,457 INFO L226 Difference]: Without dead ends: 3059 [2021-12-21 20:47:26,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 20:47:26,467 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 163 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:26,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 694 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:47:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3059 states. [2021-12-21 20:47:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3059 to 2688. [2021-12-21 20:47:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2118 states have (on average 1.151558073654391) internal successors, (2439), 2093 states have internal predecessors, (2439), 405 states have call successors, (405), 108 states have call predecessors, (405), 158 states have return successors, (786), 486 states have call predecessors, (786), 405 states have call successors, (786) [2021-12-21 20:47:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 3630 transitions. [2021-12-21 20:47:26,606 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 3630 transitions. Word has length 252 [2021-12-21 20:47:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:26,607 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 3630 transitions. [2021-12-21 20:47:26,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.3478260869565215) internal successors, (100), 18 states have internal predecessors, (100), 12 states have call successors, (22), 7 states have call predecessors, (22), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-21 20:47:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 3630 transitions. [2021-12-21 20:47:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-21 20:47:26,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:26,609 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 14, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:26,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:26,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-21 20:47:26,825 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting binomialCoefficientErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1219632254, now seen corresponding path program 1 times [2021-12-21 20:47:26,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:26,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926496825] [2021-12-21 20:47:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:26,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:26,831 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:26,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92452291] [2021-12-21 20:47:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:26,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:26,833 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:26,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-21 20:47:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 20:47:26,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 511 proven. 36 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-12-21 20:47:27,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 1318 trivial. 0 not checked. [2021-12-21 20:47:27,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:27,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926496825] [2021-12-21 20:47:27,738 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:27,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92452291] [2021-12-21 20:47:27,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92452291] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:27,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 20:47:27,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-12-21 20:47:27,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720850617] [2021-12-21 20:47:27,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:27,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 20:47:27,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:27,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 20:47:27,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-12-21 20:47:27,739 INFO L87 Difference]: Start difference. First operand 2688 states and 3630 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-21 20:47:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:28,105 INFO L93 Difference]: Finished difference Result 5102 states and 6965 transitions. [2021-12-21 20:47:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 20:47:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 254 [2021-12-21 20:47:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:28,113 INFO L225 Difference]: With dead ends: 5102 [2021-12-21 20:47:28,113 INFO L226 Difference]: Without dead ends: 2753 [2021-12-21 20:47:28,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-12-21 20:47:28,117 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 71 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:28,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 708 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-12-21 20:47:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2727. [2021-12-21 20:47:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2152 states have (on average 1.1510223048327137) internal successors, (2477), 2127 states have internal predecessors, (2477), 410 states have call successors, (410), 108 states have call predecessors, (410), 158 states have return successors, (796), 491 states have call predecessors, (796), 410 states have call successors, (796) [2021-12-21 20:47:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3683 transitions. [2021-12-21 20:47:28,225 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3683 transitions. Word has length 254 [2021-12-21 20:47:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:28,225 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3683 transitions. [2021-12-21 20:47:28,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-21 20:47:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3683 transitions. [2021-12-21 20:47:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-21 20:47:28,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:28,227 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 15, 15, 15, 15, 15, 15, 14, 14, 13, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:28,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-12-21 20:47:28,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-21 20:47:28,445 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:28,445 INFO L85 PathProgramCache]: Analyzing trace with hash 918771219, now seen corresponding path program 9 times [2021-12-21 20:47:28,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:28,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305247019] [2021-12-21 20:47:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:28,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:28,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:28,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820559868] [2021-12-21 20:47:28,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:47:28,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:28,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:28,454 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:28,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-21 20:47:28,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 20:47:28,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-21 20:47:28,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 633 proven. 125 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2021-12-21 20:47:38,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:40,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:40,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305247019] [2021-12-21 20:47:40,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 20:47:40,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820559868] [2021-12-21 20:47:40,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820559868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:40,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:47:40,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-12-21 20:47:40,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167769560] [2021-12-21 20:47:40,257 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:40,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 20:47:40,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:40,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 20:47:40,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=857, Unknown=5, NotChecked=0, Total=992 [2021-12-21 20:47:40,258 INFO L87 Difference]: Start difference. First operand 2727 states and 3683 transitions. Second operand has 30 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-21 20:47:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:47,324 INFO L93 Difference]: Finished difference Result 3117 states and 4388 transitions. [2021-12-21 20:47:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 20:47:47,326 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 297 [2021-12-21 20:47:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:47,336 INFO L225 Difference]: With dead ends: 3117 [2021-12-21 20:47:47,336 INFO L226 Difference]: Without dead ends: 3116 [2021-12-21 20:47:47,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=281, Invalid=1692, Unknown=7, NotChecked=0, Total=1980 [2021-12-21 20:47:47,339 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 149 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:47,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 764 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 570 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2021-12-21 20:47:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-12-21 20:47:47,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2758. [2021-12-21 20:47:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2172 states have (on average 1.1500920810313076) internal successors, (2498), 2147 states have internal predecessors, (2498), 420 states have call successors, (420), 119 states have call predecessors, (420), 159 states have return successors, (832), 491 states have call predecessors, (832), 420 states have call successors, (832) [2021-12-21 20:47:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 3750 transitions. [2021-12-21 20:47:47,476 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 3750 transitions. Word has length 297 [2021-12-21 20:47:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:47,477 INFO L470 AbstractCegarLoop]: Abstraction has 2758 states and 3750 transitions. [2021-12-21 20:47:47,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-21 20:47:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 3750 transitions. [2021-12-21 20:47:47,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-21 20:47:47,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:47,478 INFO L514 BasicCegarLoop]: trace histogram [30, 27, 17, 17, 17, 17, 15, 15, 14, 14, 13, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:47,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-21 20:47:47,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-21 20:47:47,696 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [factErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, factErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2021-12-21 20:47:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1126495347, now seen corresponding path program 10 times [2021-12-21 20:47:47,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:47,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709850457] [2021-12-21 20:47:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:47,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:47,704 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 20:47:47,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46267235] [2021-12-21 20:47:47,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 20:47:47,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:47,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:47,706 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:47,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-21 20:47:47,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 20:47:47,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 20:47:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 1269 proven. 226 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-12-21 20:47:48,404 INFO L328 TraceCheckSpWp]: Computing backward predicates...