./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe3c8b13f268d0f08d959b203c6650243d0aa01256dfd7d03d9b6e6990dd887b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:32:09,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:32:09,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:32:09,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:32:09,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:32:09,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:32:09,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:32:09,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:32:09,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:32:09,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:32:09,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:32:09,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:32:09,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:32:09,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:32:09,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:32:09,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:32:09,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:32:09,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:32:09,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:32:09,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:32:09,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:32:09,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:32:09,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:32:09,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:32:09,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:32:09,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:32:09,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:32:09,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:32:09,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:32:09,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:32:09,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:32:09,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:32:09,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:32:09,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:32:09,403 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:32:09,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:32:09,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:32:09,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:32:09,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:32:09,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:32:09,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:32:09,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-12-22 19:32:09,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:32:09,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:32:09,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:32:09,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:32:09,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:32:09,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:32:09,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:32:09,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:32:09,444 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:32:09,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:32:09,445 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 19:32:09,445 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:32:09,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:32:09,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 19:32:09,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:32:09,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 19:32:09,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:32:09,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 19:32:09,447 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-22 19:32:09,447 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 19:32:09,447 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:32:09,447 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:32:09,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 19:32:09,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:32:09,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:32:09,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:32:09,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:32:09,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:32:09,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:32:09,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 19:32:09,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:32:09,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:32:09,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 19:32:09,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:32:09,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe3c8b13f268d0f08d959b203c6650243d0aa01256dfd7d03d9b6e6990dd887b [2021-12-22 19:32:09,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:32:09,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:32:09,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:32:09,693 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:32:09,694 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:32:09,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i [2021-12-22 19:32:09,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69417fdf1/fa2b223fe7924090bfd867a3f6e5fe99/FLAGcfac6da3b [2021-12-22 19:32:10,174 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:32:10,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i [2021-12-22 19:32:10,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69417fdf1/fa2b223fe7924090bfd867a3f6e5fe99/FLAGcfac6da3b [2021-12-22 19:32:10,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69417fdf1/fa2b223fe7924090bfd867a3f6e5fe99 [2021-12-22 19:32:10,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:32:10,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:32:10,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:32:10,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:32:10,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:32:10,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42ed6b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10, skipping insertion in model container [2021-12-22 19:32:10,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:32:10,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:32:10,739 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i[873,886] [2021-12-22 19:32:10,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:32:10,752 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:32:10,762 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark18_conjunctive.i[873,886] [2021-12-22 19:32:10,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:32:10,776 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:32:10,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10 WrapperNode [2021-12-22 19:32:10,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:32:10,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:32:10,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:32:10,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:32:10,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,802 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2021-12-22 19:32:10,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:32:10,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:32:10,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:32:10,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:32:10,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:32:10,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:32:10,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:32:10,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:32:10,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (1/1) ... [2021-12-22 19:32:10,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:32:10,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:10,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 19:32:10,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 19:32:10,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 19:32:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 19:32:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:32:10,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:32:10,931 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:32:10,933 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:32:11,017 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:32:11,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:32:11,022 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 19:32:11,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:11 BoogieIcfgContainer [2021-12-22 19:32:11,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:32:11,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:32:11,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:32:11,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:32:11,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:32:10" (1/3) ... [2021-12-22 19:32:11,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143699a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:11, skipping insertion in model container [2021-12-22 19:32:11,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:32:10" (2/3) ... [2021-12-22 19:32:11,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143699a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:32:11, skipping insertion in model container [2021-12-22 19:32:11,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:32:11" (3/3) ... [2021-12-22 19:32:11,032 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark18_conjunctive.i [2021-12-22 19:32:11,037 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:32:11,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-12-22 19:32:11,078 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:32:11,088 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 19:32:11,088 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-22 19:32:11,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-12-22 19:32:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-22 19:32:11,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:11,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-22 19:32:11,125 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash 28695973, now seen corresponding path program 1 times [2021-12-22 19:32:11,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:11,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456498919] [2021-12-22 19:32:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:11,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:11,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:11,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456498919] [2021-12-22 19:32:11,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456498919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:32:11,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:32:11,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:32:11,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34515759] [2021-12-22 19:32:11,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:32:11,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:32:11,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:32:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:32:11,382 INFO L87 Difference]: Start difference. First operand has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 17 states have internal predecessors, (21), 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) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-12-22 19:32:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:11,428 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-12-22 19:32:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:32:11,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2021-12-22 19:32:11,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:11,436 INFO L225 Difference]: With dead ends: 35 [2021-12-22 19:32:11,437 INFO L226 Difference]: Without dead ends: 16 [2021-12-22 19:32:11,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:32:11,442 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:11,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:32:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-22 19:32:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-12-22 19:32:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 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) [2021-12-22 19:32:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-12-22 19:32:11,483 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2021-12-22 19:32:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:11,483 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-12-22 19:32:11,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-12-22 19:32:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-12-22 19:32:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 19:32:11,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:11,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 19:32:11,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 19:32:11,486 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash 889575213, now seen corresponding path program 1 times [2021-12-22 19:32:11,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:11,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383303166] [2021-12-22 19:32:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:11,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:11,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383303166] [2021-12-22 19:32:11,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383303166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:32:11,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:32:11,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:32:11,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610345109] [2021-12-22 19:32:11,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:32:11,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:32:11,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:11,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:32:11,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:32:11,566 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-22 19:32:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:11,585 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-12-22 19:32:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:32:11,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-12-22 19:32:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:11,587 INFO L225 Difference]: With dead ends: 14 [2021-12-22 19:32:11,587 INFO L226 Difference]: Without dead ends: 13 [2021-12-22 19:32:11,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:32:11,592 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:11,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:32:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-22 19:32:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-22 19:32:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.3) internal successors, (13), 12 states have internal predecessors, (13), 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) [2021-12-22 19:32:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-12-22 19:32:11,601 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 6 [2021-12-22 19:32:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:11,602 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-12-22 19:32:11,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-22 19:32:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-12-22 19:32:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 19:32:11,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:11,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:32:11,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 19:32:11,612 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1807027879, now seen corresponding path program 1 times [2021-12-22 19:32:11,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:11,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839573315] [2021-12-22 19:32:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:11,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:11,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839573315] [2021-12-22 19:32:11,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839573315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:32:11,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:32:11,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:32:11,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93392752] [2021-12-22 19:32:11,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:32:11,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:32:11,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:32:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:32:11,674 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-22 19:32:11,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:11,705 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-12-22 19:32:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:32:11,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-12-22 19:32:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:11,707 INFO L225 Difference]: With dead ends: 18 [2021-12-22 19:32:11,707 INFO L226 Difference]: Without dead ends: 17 [2021-12-22 19:32:11,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:32:11,711 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:11,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 19 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:32:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-22 19:32:11,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-12-22 19:32:11,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 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) [2021-12-22 19:32:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-12-22 19:32:11,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2021-12-22 19:32:11,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:11,721 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-12-22 19:32:11,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-12-22 19:32:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-12-22 19:32:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:32:11,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:11,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:32:11,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 19:32:11,723 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash 183289455, now seen corresponding path program 1 times [2021-12-22 19:32:11,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:11,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164115727] [2021-12-22 19:32:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:11,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:11,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164115727] [2021-12-22 19:32:11,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164115727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:32:11,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:32:11,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:32:11,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950905420] [2021-12-22 19:32:11,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:32:11,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:32:11,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:32:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:32:11,779 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-12-22 19:32:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:11,811 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-12-22 19:32:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:32:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2021-12-22 19:32:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:11,812 INFO L225 Difference]: With dead ends: 15 [2021-12-22 19:32:11,813 INFO L226 Difference]: Without dead ends: 14 [2021-12-22 19:32:11,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:32:11,814 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:11,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:32:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-22 19:32:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-22 19:32:11,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 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) [2021-12-22 19:32:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-12-22 19:32:11,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 8 [2021-12-22 19:32:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:11,823 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-12-22 19:32:11,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2021-12-22 19:32:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-12-22 19:32:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 19:32:11,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:11,825 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:32:11,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 19:32:11,825 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash 47508593, now seen corresponding path program 1 times [2021-12-22 19:32:11,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:11,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608345505] [2021-12-22 19:32:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:11,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:11,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:11,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608345505] [2021-12-22 19:32:11,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608345505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:32:11,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409740098] [2021-12-22 19:32:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:11,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:11,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:11,912 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:32:11,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 19:32:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 19:32:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:32:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:12,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:32:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:12,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409740098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:32:12,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:32:12,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-22 19:32:12,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893588651] [2021-12-22 19:32:12,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:32:12,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 19:32:12,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 19:32:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 19:32:12,142 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 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) [2021-12-22 19:32:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:12,206 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-12-22 19:32:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 19:32:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 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 10 [2021-12-22 19:32:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:12,212 INFO L225 Difference]: With dead ends: 31 [2021-12-22 19:32:12,212 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 19:32:12,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-22 19:32:12,218 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:12,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:32:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 19:32:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-12-22 19:32:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 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) [2021-12-22 19:32:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-12-22 19:32:12,231 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-12-22 19:32:12,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:12,231 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-12-22 19:32:12,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 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) [2021-12-22 19:32:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-12-22 19:32:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 19:32:12,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:12,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-22 19:32:12,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 19:32:12,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:12,434 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:12,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1588880781, now seen corresponding path program 1 times [2021-12-22 19:32:12,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:12,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635288049] [2021-12-22 19:32:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:12,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:12,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:12,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635288049] [2021-12-22 19:32:12,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635288049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:32:12,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928746648] [2021-12-22 19:32:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:12,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:12,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:12,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:32:12,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 19:32:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:12,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 19:32:12,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:32:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:12,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:32:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:12,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928746648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:32:12,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:32:12,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-22 19:32:12,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704275479] [2021-12-22 19:32:12,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:32:12,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 19:32:12,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 19:32:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 19:32:12,621 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-12-22 19:32:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:12,674 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-12-22 19:32:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 19:32:12,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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 12 [2021-12-22 19:32:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:12,676 INFO L225 Difference]: With dead ends: 31 [2021-12-22 19:32:12,676 INFO L226 Difference]: Without dead ends: 30 [2021-12-22 19:32:12,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-22 19:32:12,677 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:12,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:32:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-22 19:32:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-22 19:32:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 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) [2021-12-22 19:32:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-12-22 19:32:12,682 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 12 [2021-12-22 19:32:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:12,682 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-12-22 19:32:12,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-12-22 19:32:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-12-22 19:32:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 19:32:12,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:12,684 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2021-12-22 19:32:12,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 19:32:12,902 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,SelfDestructingSolverStorable5 [2021-12-22 19:32:12,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash 584006821, now seen corresponding path program 2 times [2021-12-22 19:32:12,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:12,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098797672] [2021-12-22 19:32:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:12,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:13,020 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:13,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:13,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098797672] [2021-12-22 19:32:13,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098797672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:32:13,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850989939] [2021-12-22 19:32:13,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:32:13,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:13,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:13,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:32:13,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 19:32:13,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 19:32:13,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:32:13,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 19:32:13,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:32:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 19:32:13,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:32:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 19:32:13,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850989939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:32:13,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:32:13,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 13 [2021-12-22 19:32:13,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856848907] [2021-12-22 19:32:13,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:32:13,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 19:32:13,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:13,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 19:32:13,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-22 19:32:13,195 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-12-22 19:32:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:13,344 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-12-22 19:32:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 19:32:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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 25 [2021-12-22 19:32:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:13,345 INFO L225 Difference]: With dead ends: 33 [2021-12-22 19:32:13,345 INFO L226 Difference]: Without dead ends: 32 [2021-12-22 19:32:13,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2021-12-22 19:32:13,347 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:13,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 40 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:32:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-22 19:32:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-12-22 19:32:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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) [2021-12-22 19:32:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-12-22 19:32:13,352 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2021-12-22 19:32:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:13,353 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-12-22 19:32:13,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 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) [2021-12-22 19:32:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-12-22 19:32:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 19:32:13,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:13,354 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2021-12-22 19:32:13,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 19:32:13,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:13,560 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1410159193, now seen corresponding path program 2 times [2021-12-22 19:32:13,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:13,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173618043] [2021-12-22 19:32:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:13,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:13,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:13,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173618043] [2021-12-22 19:32:13,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173618043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:32:13,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049132275] [2021-12-22 19:32:13,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:32:13,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:13,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:13,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:32:13,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 19:32:13,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:32:13,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:32:13,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-22 19:32:13,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:32:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:13,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:32:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:13,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049132275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:32:13,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:32:13,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-22 19:32:13,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786200128] [2021-12-22 19:32:13,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:32:13,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 19:32:13,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 19:32:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-22 19:32:13,949 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 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) [2021-12-22 19:32:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:14,106 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-22 19:32:14,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 19:32:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 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 27 [2021-12-22 19:32:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:14,110 INFO L225 Difference]: With dead ends: 60 [2021-12-22 19:32:14,110 INFO L226 Difference]: Without dead ends: 59 [2021-12-22 19:32:14,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2021-12-22 19:32:14,115 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:14,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 39 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:32:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-22 19:32:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-12-22 19:32:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 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) [2021-12-22 19:32:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-12-22 19:32:14,135 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 27 [2021-12-22 19:32:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:14,135 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-12-22 19:32:14,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 22 states have internal predecessors, (52), 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) [2021-12-22 19:32:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-12-22 19:32:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 19:32:14,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:14,139 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1] [2021-12-22 19:32:14,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 19:32:14,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:14,347 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1980812327, now seen corresponding path program 3 times [2021-12-22 19:32:14,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:14,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007804768] [2021-12-22 19:32:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:14,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:14,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:14,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007804768] [2021-12-22 19:32:14,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007804768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:32:14,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982390724] [2021-12-22 19:32:14,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:32:14,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:14,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:14,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:32:14,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 19:32:14,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-22 19:32:14,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:32:14,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 19:32:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:32:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:14,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:32:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:15,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982390724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:32:15,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:32:15,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-12-22 19:32:15,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63090355] [2021-12-22 19:32:15,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:32:15,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-22 19:32:15,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:15,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-22 19:32:15,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 19:32:15,397 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 46 states have internal predecessors, (112), 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) [2021-12-22 19:32:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:15,839 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2021-12-22 19:32:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-22 19:32:15,839 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 46 states have internal predecessors, (112), 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 57 [2021-12-22 19:32:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:15,840 INFO L225 Difference]: With dead ends: 120 [2021-12-22 19:32:15,840 INFO L226 Difference]: Without dead ends: 119 [2021-12-22 19:32:15,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1332, Invalid=3224, Unknown=0, NotChecked=0, Total=4556 [2021-12-22 19:32:15,843 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 191 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:15,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 63 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:32:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-22 19:32:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-12-22 19:32:15,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 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) [2021-12-22 19:32:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2021-12-22 19:32:15,854 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 57 [2021-12-22 19:32:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:15,855 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2021-12-22 19:32:15,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 46 states have internal predecessors, (112), 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) [2021-12-22 19:32:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2021-12-22 19:32:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-22 19:32:15,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:15,858 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1] [2021-12-22 19:32:15,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 19:32:16,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:16,080 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1874335449, now seen corresponding path program 4 times [2021-12-22 19:32:16,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:16,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847011940] [2021-12-22 19:32:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:16,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:16,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:16,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847011940] [2021-12-22 19:32:16,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847011940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:32:16,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691750636] [2021-12-22 19:32:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 19:32:16,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:16,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:32:16,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 19:32:16,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 19:32:16,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:32:16,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-22 19:32:16,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:32:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:17,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:32:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:19,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691750636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:32:19,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:32:19,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-12-22 19:32:19,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119447768] [2021-12-22 19:32:19,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:32:19,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-12-22 19:32:19,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-12-22 19:32:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2021-12-22 19:32:19,055 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 94 states have internal predecessors, (232), 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) [2021-12-22 19:32:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:20,435 INFO L93 Difference]: Finished difference Result 240 states and 263 transitions. [2021-12-22 19:32:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-22 19:32:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 94 states have internal predecessors, (232), 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 117 [2021-12-22 19:32:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:20,437 INFO L225 Difference]: With dead ends: 240 [2021-12-22 19:32:20,437 INFO L226 Difference]: Without dead ends: 239 [2021-12-22 19:32:20,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4006 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5544, Invalid=13916, Unknown=0, NotChecked=0, Total=19460 [2021-12-22 19:32:20,442 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 362 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:20,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 143 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 19:32:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-22 19:32:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2021-12-22 19:32:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.0042194092827004) internal successors, (238), 237 states have internal predecessors, (238), 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) [2021-12-22 19:32:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2021-12-22 19:32:20,474 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 117 [2021-12-22 19:32:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:20,475 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2021-12-22 19:32:20,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 94 states have internal predecessors, (232), 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) [2021-12-22 19:32:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2021-12-22 19:32:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-22 19:32:20,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:20,479 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1] [2021-12-22 19:32:20,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 19:32:20,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:20,688 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash 402760487, now seen corresponding path program 5 times [2021-12-22 19:32:20,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:20,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587601857] [2021-12-22 19:32:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:20,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:23,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587601857] [2021-12-22 19:32:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587601857] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:32:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765039680] [2021-12-22 19:32:23,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 19:32:23,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:23,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:32:23,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 19:32:23,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-22 19:32:23,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:32:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-22 19:32:23,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:32:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:23,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:32:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:29,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765039680] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:32:29,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:32:29,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-12-22 19:32:29,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132299010] [2021-12-22 19:32:29,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:32:29,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-12-22 19:32:29,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:32:29,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-12-22 19:32:29,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9119, Invalid=26791, Unknown=0, NotChecked=0, Total=35910 [2021-12-22 19:32:29,530 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand has 190 states, 189 states have (on average 2.497354497354497) internal successors, (472), 190 states have internal predecessors, (472), 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) [2021-12-22 19:32:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:32:34,487 INFO L93 Difference]: Finished difference Result 480 states and 527 transitions. [2021-12-22 19:32:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-12-22 19:32:34,488 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.497354497354497) internal successors, (472), 190 states have internal predecessors, (472), 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 237 [2021-12-22 19:32:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:32:34,489 INFO L225 Difference]: With dead ends: 480 [2021-12-22 19:32:34,490 INFO L226 Difference]: Without dead ends: 479 [2021-12-22 19:32:34,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17206 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=22608, Invalid=57764, Unknown=0, NotChecked=0, Total=80372 [2021-12-22 19:32:34,496 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 799 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 19:32:34,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 217 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 19:32:34,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-12-22 19:32:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2021-12-22 19:32:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.0020964360587001) internal successors, (478), 477 states have internal predecessors, (478), 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) [2021-12-22 19:32:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2021-12-22 19:32:34,518 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 237 [2021-12-22 19:32:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:32:34,519 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2021-12-22 19:32:34,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.497354497354497) internal successors, (472), 190 states have internal predecessors, (472), 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) [2021-12-22 19:32:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2021-12-22 19:32:34,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-12-22 19:32:34,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:32:34,531 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1] [2021-12-22 19:32:34,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 19:32:34,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:34,748 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-12-22 19:32:34,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:32:34,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1616701657, now seen corresponding path program 6 times [2021-12-22 19:32:34,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:32:34,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680186360] [2021-12-22 19:32:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:32:34,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:32:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:32:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:43,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:32:43,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680186360] [2021-12-22 19:32:43,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680186360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:32:43,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34481264] [2021-12-22 19:32:43,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 19:32:43,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:32:43,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:32:43,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:32:43,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 19:32:44,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-12-22 19:32:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:32:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 191 conjunts are in the unsatisfiable core [2021-12-22 19:32:44,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:32:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:32:45,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:33:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:33:07,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34481264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:33:07,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:33:07,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-12-22 19:33:07,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906839984] [2021-12-22 19:33:07,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:33:07,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-12-22 19:33:07,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:33:07,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-12-22 19:33:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36671, Invalid=108871, Unknown=0, NotChecked=0, Total=145542 [2021-12-22 19:33:07,251 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand has 382 states, 381 states have (on average 2.4986876640419946) internal successors, (952), 382 states have internal predecessors, (952), 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)