./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1ab1611c68b20ff5721c195b0d2c7506cb1678fd2a0003f8a2214f630d652abe --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 13:23:24,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 13:23:24,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 13:23:24,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 13:23:24,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 13:23:24,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 13:23:24,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 13:23:24,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 13:23:24,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 13:23:24,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 13:23:24,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 13:23:24,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 13:23:24,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 13:23:24,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 13:23:24,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 13:23:24,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 13:23:24,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 13:23:24,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 13:23:24,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 13:23:24,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 13:23:24,453 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 13:23:24,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 13:23:24,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 13:23:24,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 13:23:24,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 13:23:24,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 13:23:24,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 13:23:24,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 13:23:24,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 13:23:24,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 13:23:24,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 13:23:24,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 13:23:24,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 13:23:24,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 13:23:24,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 13:23:24,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 13:23:24,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 13:23:24,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 13:23:24,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 13:23:24,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 13:23:24,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 13:23:24,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 13:23:24,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-07-23 13:23:24,506 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 13:23:24,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 13:23:24,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 13:23:24,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 13:23:24,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 13:23:24,507 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 13:23:24,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 13:23:24,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 13:23:24,508 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 13:23:24,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 13:23:24,509 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 13:23:24,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 13:23:24,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 13:23:24,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-23 13:23:24,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 13:23:24,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-23 13:23:24,509 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-23 13:23:24,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-23 13:23:24,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 13:23:24,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-23 13:23:24,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 13:23:24,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 13:23:24,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 13:23:24,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:23:24,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 13:23:24,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 13:23:24,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-23 13:23:24,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 13:23:24,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 13:23:24,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-23 13:23:24,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ab1611c68b20ff5721c195b0d2c7506cb1678fd2a0003f8a2214f630d652abe [2022-07-23 13:23:24,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 13:23:24,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 13:23:24,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 13:23:24,701 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 13:23:24,702 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 13:23:24,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2022-07-23 13:23:24,759 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2044672b4/239661a0fde74c34b63c22091a185175/FLAGe94d70345 [2022-07-23 13:23:25,105 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 13:23:25,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2022-07-23 13:23:25,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2044672b4/239661a0fde74c34b63c22091a185175/FLAGe94d70345 [2022-07-23 13:23:25,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2044672b4/239661a0fde74c34b63c22091a185175 [2022-07-23 13:23:25,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 13:23:25,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 13:23:25,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 13:23:25,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 13:23:25,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 13:23:25,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f686860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25, skipping insertion in model container [2022-07-23 13:23:25,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 13:23:25,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 13:23:25,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:23:25,690 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 13:23:25,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 13:23:25,706 INFO L208 MainTranslator]: Completed translation [2022-07-23 13:23:25,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25 WrapperNode [2022-07-23 13:23:25,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 13:23:25,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 13:23:25,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 13:23:25,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 13:23:25,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,729 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 14 [2022-07-23 13:23:25,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 13:23:25,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 13:23:25,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 13:23:25,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 13:23:25,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 13:23:25,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 13:23:25,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 13:23:25,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 13:23:25,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (1/1) ... [2022-07-23 13:23:25,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 13:23:25,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:25,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-23 13:23:25,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-23 13:23:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-23 13:23:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-23 13:23:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 13:23:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 13:23:25,863 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 13:23:25,864 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 13:23:25,935 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 13:23:25,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 13:23:25,940 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-23 13:23:25,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:23:25 BoogieIcfgContainer [2022-07-23 13:23:25,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 13:23:25,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 13:23:25,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 13:23:25,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 13:23:25,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 01:23:25" (1/3) ... [2022-07-23 13:23:25,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34286d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:23:25, skipping insertion in model container [2022-07-23 13:23:25,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 01:23:25" (2/3) ... [2022-07-23 13:23:25,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34286d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 01:23:25, skipping insertion in model container [2022-07-23 13:23:25,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 01:23:25" (3/3) ... [2022-07-23 13:23:25,947 INFO L111 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2022-07-23 13:23:25,955 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 13:23:25,955 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-23 13:23:25,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 13:23:25,989 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3ab1e5f3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@431ec444 [2022-07-23 13:23:25,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-23 13:23:25,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 13:23:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 13:23:25,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:25,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:25,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1484225386, now seen corresponding path program 1 times [2022-07-23 13:23:26,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:26,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91582951] [2022-07-23 13:23:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:26,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:26,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:26,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91582951] [2022-07-23 13:23:26,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91582951] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:23:26,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:23:26,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:23:26,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379446083] [2022-07-23 13:23:26,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:23:26,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:23:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:26,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:23:26,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:23:26,136 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:26,205 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-07-23 13:23:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:23:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 13:23:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:26,212 INFO L225 Difference]: With dead ends: 45 [2022-07-23 13:23:26,212 INFO L226 Difference]: Without dead ends: 29 [2022-07-23 13:23:26,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:23:26,216 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:26,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 66 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:23:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-23 13:23:26,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2022-07-23 13:23:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-23 13:23:26,290 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2022-07-23 13:23:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:26,290 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-23 13:23:26,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-23 13:23:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 13:23:26,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:26,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:26,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 13:23:26,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:26,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1484225162, now seen corresponding path program 1 times [2022-07-23 13:23:26,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:26,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692957646] [2022-07-23 13:23:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:26,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:26,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:26,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692957646] [2022-07-23 13:23:26,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692957646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:23:26,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:23:26,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:23:26,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637038704] [2022-07-23 13:23:26,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:23:26,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:23:26,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:23:26,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:23:26,350 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:26,396 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-07-23 13:23:26,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:23:26,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-23 13:23:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:26,397 INFO L225 Difference]: With dead ends: 35 [2022-07-23 13:23:26,398 INFO L226 Difference]: Without dead ends: 34 [2022-07-23 13:23:26,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:23:26,399 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:26,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:23:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-23 13:23:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2022-07-23 13:23:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-23 13:23:26,405 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2022-07-23 13:23:26,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:26,405 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-23 13:23:26,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-23 13:23:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 13:23:26,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:26,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:26,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 13:23:26,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1233653331, now seen corresponding path program 1 times [2022-07-23 13:23:26,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:26,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969724144] [2022-07-23 13:23:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:26,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:26,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969724144] [2022-07-23 13:23:26,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969724144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:23:26,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:23:26,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:23:26,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316036067] [2022-07-23 13:23:26,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:23:26,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:23:26,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:26,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:23:26,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:23:26,435 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:26,461 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-23 13:23:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:23:26,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 13:23:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:26,462 INFO L225 Difference]: With dead ends: 34 [2022-07-23 13:23:26,462 INFO L226 Difference]: Without dead ends: 33 [2022-07-23 13:23:26,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:23:26,463 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:26,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 46 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:23:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-23 13:23:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-07-23 13:23:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-23 13:23:26,472 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 9 [2022-07-23 13:23:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:26,473 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-23 13:23:26,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-23 13:23:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 13:23:26,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:26,474 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:26,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 13:23:26,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:26,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1233660282, now seen corresponding path program 1 times [2022-07-23 13:23:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:26,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615073316] [2022-07-23 13:23:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:26,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615073316] [2022-07-23 13:23:26,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615073316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:23:26,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 13:23:26,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 13:23:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249969718] [2022-07-23 13:23:26,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:23:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:23:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:23:26,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 13:23:26,501 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:26,562 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-07-23 13:23:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 13:23:26,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-23 13:23:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:26,563 INFO L225 Difference]: With dead ends: 33 [2022-07-23 13:23:26,565 INFO L226 Difference]: Without dead ends: 32 [2022-07-23 13:23:26,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 13:23:26,566 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:26,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:23:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-23 13:23:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-23 13:23:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-23 13:23:26,579 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 9 [2022-07-23 13:23:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:26,579 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-23 13:23:26,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-23 13:23:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 13:23:26,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:26,580 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:26,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 13:23:26,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash -525255530, now seen corresponding path program 1 times [2022-07-23 13:23:26,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:26,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865395536] [2022-07-23 13:23:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:26,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:26,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865395536] [2022-07-23 13:23:26,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865395536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:26,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128947983] [2022-07-23 13:23:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:26,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:26,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:26,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:26,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 13:23:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:26,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:23:26,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:26,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:23:26,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128947983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:23:26,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 13:23:26,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-07-23 13:23:26,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535311473] [2022-07-23 13:23:26,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:23:26,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:23:26,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:23:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-23 13:23:26,734 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:26,784 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-07-23 13:23:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:23:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 13:23:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:26,785 INFO L225 Difference]: With dead ends: 44 [2022-07-23 13:23:26,786 INFO L226 Difference]: Without dead ends: 43 [2022-07-23 13:23:26,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-23 13:23:26,787 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:26,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:23:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-23 13:23:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-07-23 13:23:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-23 13:23:26,792 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2022-07-23 13:23:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:26,792 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-23 13:23:26,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-23 13:23:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 13:23:26,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:26,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:26,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:27,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:27,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash 909324273, now seen corresponding path program 1 times [2022-07-23 13:23:27,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:27,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12911816] [2022-07-23 13:23:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:27,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:27,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:27,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12911816] [2022-07-23 13:23:27,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12911816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:27,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223664632] [2022-07-23 13:23:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:27,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:27,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:27,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:27,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 13:23:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:27,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:23:27,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:27,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:27,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223664632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:27,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:27,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-23 13:23:27,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050934373] [2022-07-23 13:23:27,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:27,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 13:23:27,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 13:23:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-23 13:23:27,171 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:27,445 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2022-07-23 13:23:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 13:23:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 13:23:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:27,446 INFO L225 Difference]: With dead ends: 87 [2022-07-23 13:23:27,447 INFO L226 Difference]: Without dead ends: 85 [2022-07-23 13:23:27,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-07-23 13:23:27,448 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:27,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 52 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:23:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-23 13:23:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2022-07-23 13:23:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.368421052631579) internal successors, (52), 41 states have internal predecessors, (52), 7 states have call successors, (7), 6 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-07-23 13:23:27,454 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 14 [2022-07-23 13:23:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:27,455 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-07-23 13:23:27,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-07-23 13:23:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 13:23:27,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:27,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:27,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:27,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-23 13:23:27,673 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash 909324497, now seen corresponding path program 1 times [2022-07-23 13:23:27,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:27,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308127290] [2022-07-23 13:23:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:27,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:27,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308127290] [2022-07-23 13:23:27,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308127290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:27,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629498636] [2022-07-23 13:23:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:27,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:27,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:27,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:27,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 13:23:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:23:27,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:27,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:27,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629498636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:27,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:27,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-23 13:23:27,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624091064] [2022-07-23 13:23:27,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:27,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 13:23:27,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:27,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 13:23:27,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-23 13:23:27,788 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:27,856 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-07-23 13:23:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 13:23:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-23 13:23:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:27,858 INFO L225 Difference]: With dead ends: 50 [2022-07-23 13:23:27,858 INFO L226 Difference]: Without dead ends: 49 [2022-07-23 13:23:27,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-23 13:23:27,859 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:27,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:23:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-23 13:23:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 22. [2022-07-23 13:23:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-23 13:23:27,862 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2022-07-23 13:23:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:27,863 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-23 13:23:27,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-23 13:23:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 13:23:27,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:27,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:27,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:28,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:28,069 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash 896940851, now seen corresponding path program 1 times [2022-07-23 13:23:28,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142265639] [2022-07-23 13:23:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:28,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:28,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142265639] [2022-07-23 13:23:28,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142265639] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:28,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803865600] [2022-07-23 13:23:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:28,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:28,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:28,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:28,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 13:23:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:23:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:28,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:28,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803865600] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:28,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:28,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-23 13:23:28,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217058983] [2022-07-23 13:23:28,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:28,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 13:23:28,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 13:23:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-23 13:23:28,221 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:28,282 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-07-23 13:23:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 13:23:28,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 13:23:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:28,283 INFO L225 Difference]: With dead ends: 55 [2022-07-23 13:23:28,283 INFO L226 Difference]: Without dead ends: 54 [2022-07-23 13:23:28,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-23 13:23:28,284 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:28,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 85 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:23:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-23 13:23:28,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2022-07-23 13:23:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-07-23 13:23:28,290 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 15 [2022-07-23 13:23:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:28,290 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-07-23 13:23:28,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-07-23 13:23:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 13:23:28,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:28,291 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:28,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:28,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:28,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash 896947802, now seen corresponding path program 1 times [2022-07-23 13:23:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463041384] [2022-07-23 13:23:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:28,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:28,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463041384] [2022-07-23 13:23:28,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463041384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790392774] [2022-07-23 13:23:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:28,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:28,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:28,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:28,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 13:23:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:28,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 13:23:28,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:28,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 13:23:28,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790392774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 13:23:28,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 13:23:28,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-07-23 13:23:28,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542491823] [2022-07-23 13:23:28,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 13:23:28,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 13:23:28,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 13:23:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-23 13:23:28,614 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:28,660 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-07-23 13:23:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 13:23:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 13:23:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:28,661 INFO L225 Difference]: With dead ends: 51 [2022-07-23 13:23:28,661 INFO L226 Difference]: Without dead ends: 50 [2022-07-23 13:23:28,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-23 13:23:28,662 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:28,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 13:23:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-23 13:23:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-07-23 13:23:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-07-23 13:23:28,668 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 15 [2022-07-23 13:23:28,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:28,668 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-07-23 13:23:28,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-07-23 13:23:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 13:23:28,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:28,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:28,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:28,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:28,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:28,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1875718568, now seen corresponding path program 1 times [2022-07-23 13:23:28,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:28,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866947758] [2022-07-23 13:23:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:28,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:28,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:28,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866947758] [2022-07-23 13:23:28,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866947758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:28,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853828344] [2022-07-23 13:23:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:28,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:28,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:28,957 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:28,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 13:23:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:28,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:23:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:28,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:29,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853828344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:29,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:29,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-23 13:23:29,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306795123] [2022-07-23 13:23:29,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:29,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 13:23:29,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:29,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 13:23:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-23 13:23:29,035 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:29,203 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2022-07-23 13:23:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 13:23:29,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 13:23:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:29,204 INFO L225 Difference]: With dead ends: 87 [2022-07-23 13:23:29,204 INFO L226 Difference]: Without dead ends: 85 [2022-07-23 13:23:29,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-07-23 13:23:29,205 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:29,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 111 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:23:29,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-23 13:23:29,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-07-23 13:23:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 56 states have internal predecessors, (68), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-23 13:23:29,232 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 15 [2022-07-23 13:23:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:29,232 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-23 13:23:29,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-23 13:23:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 13:23:29,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:29,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:29,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:29,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:29,433 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:29,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1875711617, now seen corresponding path program 1 times [2022-07-23 13:23:29,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:29,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027381774] [2022-07-23 13:23:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:29,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:29,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:29,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027381774] [2022-07-23 13:23:29,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027381774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:29,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418353027] [2022-07-23 13:23:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:29,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:29,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:29,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:29,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 13:23:29,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 13:23:29,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:29,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:29,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418353027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:29,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:29,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-23 13:23:29,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460106914] [2022-07-23 13:23:29,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:29,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 13:23:29,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:29,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 13:23:29,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-23 13:23:29,562 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:29,839 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2022-07-23 13:23:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 13:23:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 13:23:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:29,840 INFO L225 Difference]: With dead ends: 102 [2022-07-23 13:23:29,840 INFO L226 Difference]: Without dead ends: 100 [2022-07-23 13:23:29,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-07-23 13:23:29,841 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:29,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 53 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:23:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-23 13:23:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2022-07-23 13:23:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.203125) internal successors, (77), 67 states have internal predecessors, (77), 13 states have call successors, (13), 11 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-07-23 13:23:29,866 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 15 [2022-07-23 13:23:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:29,866 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-07-23 13:23:29,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-07-23 13:23:29,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 13:23:29,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:29,867 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:29,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-23 13:23:30,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:30,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -604655592, now seen corresponding path program 1 times [2022-07-23 13:23:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:30,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267625156] [2022-07-23 13:23:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:30,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:30,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:30,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267625156] [2022-07-23 13:23:30,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267625156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878386295] [2022-07-23 13:23:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:30,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:30,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:30,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:30,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 13:23:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 13:23:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:30,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:30,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878386295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:30,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:30,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-07-23 13:23:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059124999] [2022-07-23 13:23:30,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 13:23:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:30,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 13:23:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-07-23 13:23:30,329 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:30,801 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2022-07-23 13:23:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-23 13:23:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 13:23:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:30,802 INFO L225 Difference]: With dead ends: 155 [2022-07-23 13:23:30,802 INFO L226 Difference]: Without dead ends: 153 [2022-07-23 13:23:30,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=2203, Unknown=0, NotChecked=0, Total=2756 [2022-07-23 13:23:30,804 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 298 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:30,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 93 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:23:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-23 13:23:30,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 79. [2022-07-23 13:23:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 66 states have internal predecessors, (79), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2022-07-23 13:23:30,814 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 27 [2022-07-23 13:23:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:30,814 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2022-07-23 13:23:30,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2022-07-23 13:23:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 13:23:30,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:30,815 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:30,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-23 13:23:31,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-23 13:23:31,049 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:31,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1302475036, now seen corresponding path program 1 times [2022-07-23 13:23:31,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:31,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527288606] [2022-07-23 13:23:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:31,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:31,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:31,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527288606] [2022-07-23 13:23:31,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527288606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331026697] [2022-07-23 13:23:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:31,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:31,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:31,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 13:23:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:31,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 13:23:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:31,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:31,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331026697] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:31,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:31,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-23 13:23:31,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549560877] [2022-07-23 13:23:31,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:31,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 13:23:31,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:31,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 13:23:31,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-23 13:23:31,279 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:31,641 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2022-07-23 13:23:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-23 13:23:31,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-23 13:23:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:31,642 INFO L225 Difference]: With dead ends: 198 [2022-07-23 13:23:31,642 INFO L226 Difference]: Without dead ends: 196 [2022-07-23 13:23:31,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2022-07-23 13:23:31,644 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 171 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:31,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 85 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:23:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-23 13:23:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2022-07-23 13:23:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.21) internal successors, (121), 101 states have internal predecessors, (121), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2022-07-23 13:23:31,658 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 27 [2022-07-23 13:23:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:31,658 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2022-07-23 13:23:31,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2022-07-23 13:23:31,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 13:23:31,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:31,660 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-23 13:23:31,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-23 13:23:31,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-23 13:23:31,877 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1390087159, now seen corresponding path program 2 times [2022-07-23 13:23:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:31,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944845731] [2022-07-23 13:23:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:31,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:31,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944845731] [2022-07-23 13:23:31,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944845731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:31,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963011622] [2022-07-23 13:23:31,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:23:31,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:31,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:31,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:31,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 13:23:31,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:23:31,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:23:31,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 13:23:31,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:32,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:32,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963011622] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:32,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:32,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 29 [2022-07-23 13:23:32,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867855082] [2022-07-23 13:23:32,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:32,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 13:23:32,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 13:23:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-07-23 13:23:32,204 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 30 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 17 states have internal predecessors, (73), 13 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:32,857 INFO L93 Difference]: Finished difference Result 266 states and 306 transitions. [2022-07-23 13:23:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-23 13:23:32,857 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 17 states have internal predecessors, (73), 13 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-23 13:23:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:32,858 INFO L225 Difference]: With dead ends: 266 [2022-07-23 13:23:32,858 INFO L226 Difference]: Without dead ends: 264 [2022-07-23 13:23:32,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1389, Invalid=5921, Unknown=0, NotChecked=0, Total=7310 [2022-07-23 13:23:32,861 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 466 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:32,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 128 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 13:23:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-23 13:23:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 147. [2022-07-23 13:23:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 123 states have internal predecessors, (148), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2022-07-23 13:23:32,892 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 39 [2022-07-23 13:23:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:32,892 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2022-07-23 13:23:32,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 17 states have internal predecessors, (73), 13 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2022-07-23 13:23:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 13:23:32,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:32,894 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-07-23 13:23:32,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:33,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-23 13:23:33,110 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash 873114018, now seen corresponding path program 2 times [2022-07-23 13:23:33,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:33,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690467806] [2022-07-23 13:23:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:33,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 13:23:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690467806] [2022-07-23 13:23:33,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690467806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:33,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644832528] [2022-07-23 13:23:33,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:23:33,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:33,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:33,176 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:33,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 13:23:33,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:23:33,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:23:33,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 13:23:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:33,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:33,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644832528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:33,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:33,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 32 [2022-07-23 13:23:33,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109223836] [2022-07-23 13:23:33,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:33,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 13:23:33,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:33,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 13:23:33,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 13:23:33,597 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 33 states, 30 states have (on average 2.8) internal successors, (84), 19 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:35,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:35,236 INFO L93 Difference]: Finished difference Result 801 states and 933 transitions. [2022-07-23 13:23:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-23 13:23:35,237 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.8) internal successors, (84), 19 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-23 13:23:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:35,239 INFO L225 Difference]: With dead ends: 801 [2022-07-23 13:23:35,239 INFO L226 Difference]: Without dead ends: 799 [2022-07-23 13:23:35,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1863, Invalid=9909, Unknown=0, NotChecked=0, Total=11772 [2022-07-23 13:23:35,242 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 790 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:35,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 127 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 13:23:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-07-23 13:23:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 309. [2022-07-23 13:23:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 257 states have (on average 1.2140077821011672) internal successors, (312), 258 states have internal predecessors, (312), 50 states have call successors, (50), 50 states have call predecessors, (50), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 362 transitions. [2022-07-23 13:23:35,292 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 362 transitions. Word has length 39 [2022-07-23 13:23:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:35,293 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 362 transitions. [2022-07-23 13:23:35,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.8) internal successors, (84), 19 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 362 transitions. [2022-07-23 13:23:35,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 13:23:35,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:35,294 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-23 13:23:35,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-23 13:23:35,510 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1678937939, now seen corresponding path program 3 times [2022-07-23 13:23:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:35,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520727889] [2022-07-23 13:23:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 70 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-23 13:23:35,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:35,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520727889] [2022-07-23 13:23:35,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520727889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:35,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683808959] [2022-07-23 13:23:35,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:23:35,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:35,590 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:35,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 13:23:35,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 13:23:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:23:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 13:23:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 13:23:35,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-23 13:23:35,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683808959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:35,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:35,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2022-07-23 13:23:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219280442] [2022-07-23 13:23:35,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 13:23:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 13:23:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-23 13:23:35,657 INFO L87 Difference]: Start difference. First operand 309 states and 362 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (11), 7 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:35,789 INFO L93 Difference]: Finished difference Result 373 states and 436 transitions. [2022-07-23 13:23:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 13:23:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (11), 7 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-23 13:23:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:35,790 INFO L225 Difference]: With dead ends: 373 [2022-07-23 13:23:35,790 INFO L226 Difference]: Without dead ends: 143 [2022-07-23 13:23:35,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-23 13:23:35,791 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:35,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 71 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:23:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-23 13:23:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2022-07-23 13:23:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-07-23 13:23:35,806 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 51 [2022-07-23 13:23:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:35,806 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-07-23 13:23:35,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (11), 7 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-07-23 13:23:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-23 13:23:35,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:35,807 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:35,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-23 13:23:36,023 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:36,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1889993342, now seen corresponding path program 4 times [2022-07-23 13:23:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110509165] [2022-07-23 13:23:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:36,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:36,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110509165] [2022-07-23 13:23:36,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110509165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:36,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111377145] [2022-07-23 13:23:36,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 13:23:36,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:36,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:36,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:36,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 13:23:36,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 13:23:36,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:23:36,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 13:23:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:36,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:36,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111377145] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:36,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:36,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2022-07-23 13:23:36,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58267308] [2022-07-23 13:23:36,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:36,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-23 13:23:36,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:36,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-23 13:23:36,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1626, Unknown=0, NotChecked=0, Total=1892 [2022-07-23 13:23:36,708 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 44 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 24 states have internal predecessors, (104), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:37,870 INFO L93 Difference]: Finished difference Result 247 states and 263 transitions. [2022-07-23 13:23:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-23 13:23:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 24 states have internal predecessors, (104), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-23 13:23:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:37,872 INFO L225 Difference]: With dead ends: 247 [2022-07-23 13:23:37,872 INFO L226 Difference]: Without dead ends: 246 [2022-07-23 13:23:37,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3500 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2303, Invalid=9907, Unknown=0, NotChecked=0, Total=12210 [2022-07-23 13:23:37,875 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 787 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:37,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 72 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 13:23:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-23 13:23:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 240. [2022-07-23 13:23:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 200 states have (on average 1.03) internal successors, (206), 200 states have internal predecessors, (206), 39 states have call successors, (39), 39 states have call predecessors, (39), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2022-07-23 13:23:37,902 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 63 [2022-07-23 13:23:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:37,903 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2022-07-23 13:23:37,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 24 states have internal predecessors, (104), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2022-07-23 13:23:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-23 13:23:37,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:37,905 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2022-07-23 13:23:37,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:38,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-23 13:23:38,122 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:38,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2051033654, now seen corresponding path program 2 times [2022-07-23 13:23:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:38,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695926370] [2022-07-23 13:23:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:38,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:38,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695926370] [2022-07-23 13:23:38,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695926370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:38,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721373869] [2022-07-23 13:23:38,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:23:38,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:38,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:38,416 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:38,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 13:23:38,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:23:38,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:23:38,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 13:23:38,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:38,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:39,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721373869] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:39,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:39,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2022-07-23 13:23:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875427487] [2022-07-23 13:23:39,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:39,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-23 13:23:39,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:39,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-23 13:23:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2022-07-23 13:23:39,059 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:39,841 INFO L93 Difference]: Finished difference Result 280 states and 287 transitions. [2022-07-23 13:23:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-23 13:23:39,842 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-23 13:23:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:39,843 INFO L225 Difference]: With dead ends: 280 [2022-07-23 13:23:39,843 INFO L226 Difference]: Without dead ends: 279 [2022-07-23 13:23:39,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1350, Invalid=7392, Unknown=0, NotChecked=0, Total=8742 [2022-07-23 13:23:39,845 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:39,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 205 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 13:23:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-23 13:23:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 270. [2022-07-23 13:23:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 225 states have internal predecessors, (229), 44 states have call successors, (44), 44 states have call predecessors, (44), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:39,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 273 transitions. [2022-07-23 13:23:39,872 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 273 transitions. Word has length 81 [2022-07-23 13:23:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:39,872 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 273 transitions. [2022-07-23 13:23:39,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 273 transitions. [2022-07-23 13:23:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-23 13:23:39,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:39,873 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:39,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:40,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:40,091 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:40,092 INFO L85 PathProgramCache]: Analyzing trace with hash -925511303, now seen corresponding path program 5 times [2022-07-23 13:23:40,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:40,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29880756] [2022-07-23 13:23:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:40,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:40,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29880756] [2022-07-23 13:23:40,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29880756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:40,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267957247] [2022-07-23 13:23:40,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 13:23:40,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:40,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:40,605 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:40,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 13:23:40,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-23 13:23:40,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:23:40,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-23 13:23:40,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:40,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:41,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267957247] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:41,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:41,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 87 [2022-07-23 13:23:41,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488547926] [2022-07-23 13:23:41,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:41,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-07-23 13:23:41,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:41,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-07-23 13:23:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=6640, Unknown=0, NotChecked=0, Total=7656 [2022-07-23 13:23:41,752 INFO L87 Difference]: Start difference. First operand 270 states and 273 transitions. Second operand has 88 states, 85 states have (on average 2.5176470588235293) internal successors, (214), 46 states have internal predecessors, (214), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:44,744 INFO L93 Difference]: Finished difference Result 496 states and 526 transitions. [2022-07-23 13:23:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-07-23 13:23:44,744 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 85 states have (on average 2.5176470588235293) internal successors, (214), 46 states have internal predecessors, (214), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-07-23 13:23:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:44,746 INFO L225 Difference]: With dead ends: 496 [2022-07-23 13:23:44,746 INFO L226 Difference]: Without dead ends: 495 [2022-07-23 13:23:44,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16581 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=9505, Invalid=41797, Unknown=0, NotChecked=0, Total=51302 [2022-07-23 13:23:44,755 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1269 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:44,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 108 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 13:23:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-07-23 13:23:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 486. [2022-07-23 13:23:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 405 states have (on average 1.0222222222222221) internal successors, (414), 405 states have internal predecessors, (414), 80 states have call successors, (80), 80 states have call predecessors, (80), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 494 transitions. [2022-07-23 13:23:44,805 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 494 transitions. Word has length 129 [2022-07-23 13:23:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:44,805 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 494 transitions. [2022-07-23 13:23:44,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 85 states have (on average 2.5176470588235293) internal successors, (214), 46 states have internal predecessors, (214), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 494 transitions. [2022-07-23 13:23:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-23 13:23:44,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:44,807 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2022-07-23 13:23:44,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:45,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:45,024 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1310081852, now seen corresponding path program 3 times [2022-07-23 13:23:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:45,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268985263] [2022-07-23 13:23:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:45,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:45,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268985263] [2022-07-23 13:23:45,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268985263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:45,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550620832] [2022-07-23 13:23:45,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 13:23:45,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:45,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:45,842 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:45,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 13:23:45,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-07-23 13:23:45,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:23:45,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-23 13:23:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:46,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:47,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550620832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:47,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:47,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 111 [2022-07-23 13:23:47,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215396974] [2022-07-23 13:23:47,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:47,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-23 13:23:47,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:47,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-23 13:23:47,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1628, Invalid=10804, Unknown=0, NotChecked=0, Total=12432 [2022-07-23 13:23:47,213 INFO L87 Difference]: Start difference. First operand 486 states and 494 transitions. Second operand has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:23:48,789 INFO L93 Difference]: Finished difference Result 578 states and 592 transitions. [2022-07-23 13:23:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-07-23 13:23:48,790 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-07-23 13:23:48,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:23:48,792 INFO L225 Difference]: With dead ends: 578 [2022-07-23 13:23:48,792 INFO L226 Difference]: Without dead ends: 577 [2022-07-23 13:23:48,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11021 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5438, Invalid=31234, Unknown=0, NotChecked=0, Total=36672 [2022-07-23 13:23:48,808 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 790 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 13:23:48,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 331 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 13:23:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-07-23 13:23:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 564. [2022-07-23 13:23:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 470 states have (on average 1.0170212765957447) internal successors, (478), 470 states have internal predecessors, (478), 93 states have call successors, (93), 93 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 571 transitions. [2022-07-23 13:23:48,898 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 571 transitions. Word has length 165 [2022-07-23 13:23:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:23:48,898 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 571 transitions. [2022-07-23 13:23:48,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:23:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 571 transitions. [2022-07-23 13:23:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-23 13:23:48,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:23:48,919 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:23:48,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 13:23:49,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:49,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:23:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:23:49,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885854, now seen corresponding path program 6 times [2022-07-23 13:23:49,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:23:49,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22513393] [2022-07-23 13:23:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:23:49,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:23:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:23:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5003 backedges. 0 proven. 5003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:50,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:23:50,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22513393] [2022-07-23 13:23:50,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22513393] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:23:50,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295105858] [2022-07-23 13:23:50,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 13:23:50,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:23:50,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:23:50,569 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:23:50,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 13:23:50,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-07-23 13:23:50,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:23:50,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-23 13:23:50,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:23:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5003 backedges. 0 proven. 5003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:50,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:23:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5003 backedges. 0 proven. 5003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:23:54,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295105858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:23:54,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:23:54,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 171 [2022-07-23 13:23:54,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257555649] [2022-07-23 13:23:54,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:23:54,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-07-23 13:23:54,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:23:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-07-23 13:23:54,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3786, Invalid=25626, Unknown=0, NotChecked=0, Total=29412 [2022-07-23 13:23:54,134 INFO L87 Difference]: Start difference. First operand 564 states and 571 transitions. Second operand has 172 states, 169 states have (on average 2.5088757396449703) internal successors, (424), 88 states have internal predecessors, (424), 84 states have call successors, (84), 84 states have call predecessors, (84), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:24:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:05,127 INFO L93 Difference]: Finished difference Result 1026 states and 1090 transitions. [2022-07-23 13:24:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 379 states. [2022-07-23 13:24:05,127 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 169 states have (on average 2.5088757396449703) internal successors, (424), 88 states have internal predecessors, (424), 84 states have call successors, (84), 84 states have call predecessors, (84), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-07-23 13:24:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:05,130 INFO L225 Difference]: With dead ends: 1026 [2022-07-23 13:24:05,130 INFO L226 Difference]: Without dead ends: 1025 [2022-07-23 13:24:05,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70684 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=39231, Invalid=174675, Unknown=0, NotChecked=0, Total=213906 [2022-07-23 13:24:05,142 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5036 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5036 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:05,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5036 Valid, 131 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 13:24:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-07-23 13:24:05,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 1008. [2022-07-23 13:24:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 840 states have (on average 1.0202380952380952) internal successors, (857), 840 states have internal predecessors, (857), 167 states have call successors, (167), 167 states have call predecessors, (167), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:24:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1024 transitions. [2022-07-23 13:24:05,277 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1024 transitions. Word has length 255 [2022-07-23 13:24:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:05,278 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1024 transitions. [2022-07-23 13:24:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 169 states have (on average 2.5088757396449703) internal successors, (424), 88 states have internal predecessors, (424), 84 states have call successors, (84), 84 states have call predecessors, (84), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:24:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1024 transitions. [2022-07-23 13:24:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-07-23 13:24:05,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:05,281 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 55, 54, 54, 1, 1, 1, 1, 1] [2022-07-23 13:24:05,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 13:24:05,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:05,500 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:24:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:05,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1347688376, now seen corresponding path program 4 times [2022-07-23 13:24:05,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:05,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555205768] [2022-07-23 13:24:05,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:05,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:08,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555205768] [2022-07-23 13:24:08,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555205768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140391205] [2022-07-23 13:24:08,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 13:24:08,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:08,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:08,163 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:24:08,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 13:24:08,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 13:24:08,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:24:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-23 13:24:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:08,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:12,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140391205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:12,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:12,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112, 112] total 223 [2022-07-23 13:24:12,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260735308] [2022-07-23 13:24:12,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:12,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2022-07-23 13:24:12,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:12,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2022-07-23 13:24:12,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6388, Invalid=43564, Unknown=0, NotChecked=0, Total=49952 [2022-07-23 13:24:12,327 INFO L87 Difference]: Start difference. First operand 1008 states and 1024 transitions. Second operand has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:24:17,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:24:17,967 INFO L93 Difference]: Finished difference Result 1178 states and 1206 transitions. [2022-07-23 13:24:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-07-23 13:24:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2022-07-23 13:24:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:24:17,981 INFO L225 Difference]: With dead ends: 1178 [2022-07-23 13:24:17,981 INFO L226 Difference]: Without dead ends: 1177 [2022-07-23 13:24:17,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47463 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=21846, Invalid=128310, Unknown=0, NotChecked=0, Total=150156 [2022-07-23 13:24:17,989 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1915 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 13:24:17,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 602 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 13:24:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-07-23 13:24:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1158. [2022-07-23 13:24:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 965 states have (on average 1.0145077720207254) internal successors, (979), 965 states have internal predecessors, (979), 192 states have call successors, (192), 192 states have call predecessors, (192), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:24:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1171 transitions. [2022-07-23 13:24:18,160 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1171 transitions. Word has length 333 [2022-07-23 13:24:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:24:18,160 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1171 transitions. [2022-07-23 13:24:18,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:24:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1171 transitions. [2022-07-23 13:24:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-23 13:24:18,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:24:18,166 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 84, 84, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:24:18,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-23 13:24:18,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:18,380 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:24:18,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:24:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash -14550343, now seen corresponding path program 7 times [2022-07-23 13:24:18,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:24:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932785397] [2022-07-23 13:24:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:24:18,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:24:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21085 backedges. 0 proven. 21085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:24:22,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932785397] [2022-07-23 13:24:22,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932785397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:24:22,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609018459] [2022-07-23 13:24:22,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 13:24:22,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:24:22,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:24:22,955 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:24:22,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 13:24:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:24:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 172 conjunts are in the unsatisfiable core [2022-07-23 13:24:23,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:24:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21085 backedges. 0 proven. 21085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:23,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:24:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21085 backedges. 0 proven. 21085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:24:32,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609018459] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:24:32,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:24:32,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [172, 172, 172] total 343 [2022-07-23 13:24:32,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011529312] [2022-07-23 13:24:32,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:24:32,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 344 states [2022-07-23 13:24:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:24:32,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 344 interpolants. [2022-07-23 13:24:32,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14968, Invalid=103024, Unknown=0, NotChecked=0, Total=117992 [2022-07-23 13:24:32,229 INFO L87 Difference]: Start difference. First operand 1158 states and 1171 transitions. Second operand has 344 states, 341 states have (on average 2.504398826979472) internal successors, (854), 174 states have internal predecessors, (854), 170 states have call successors, (170), 170 states have call predecessors, (170), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:25:20,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:25:20,378 INFO L93 Difference]: Finished difference Result 2054 states and 2180 transitions. [2022-07-23 13:25:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 759 states. [2022-07-23 13:25:20,379 INFO L78 Accepts]: Start accepts. Automaton has has 344 states, 341 states have (on average 2.504398826979472) internal successors, (854), 174 states have internal predecessors, (854), 170 states have call successors, (170), 170 states have call predecessors, (170), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 513 [2022-07-23 13:25:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:25:20,385 INFO L225 Difference]: With dead ends: 2054 [2022-07-23 13:25:20,385 INFO L226 Difference]: Without dead ends: 2053 [2022-07-23 13:25:20,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1783 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 929 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302085 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=158113, Invalid=707717, Unknown=0, NotChecked=0, Total=865830 [2022-07-23 13:25:20,418 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7699 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7699 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 13:25:20,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7699 Valid, 186 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-23 13:25:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2022-07-23 13:25:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 2022. [2022-07-23 13:25:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1685 states have (on average 1.0183976261127596) internal successors, (1716), 1685 states have internal predecessors, (1716), 336 states have call successors, (336), 336 states have call predecessors, (336), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:25:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 2052 transitions. [2022-07-23 13:25:20,620 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 2052 transitions. Word has length 513 [2022-07-23 13:25:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:25:20,622 INFO L495 AbstractCegarLoop]: Abstraction has 2022 states and 2052 transitions. [2022-07-23 13:25:20,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 344 states, 341 states have (on average 2.504398826979472) internal successors, (854), 174 states have internal predecessors, (854), 170 states have call successors, (170), 170 states have call predecessors, (170), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:25:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 2052 transitions. [2022-07-23 13:25:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-07-23 13:25:20,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:25:20,627 INFO L195 NwaCegarLoop]: trace histogram [111, 111, 111, 111, 110, 110, 1, 1, 1, 1, 1] [2022-07-23 13:25:20,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 13:25:20,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:20,845 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:25:20,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:25:20,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2066219424, now seen corresponding path program 5 times [2022-07-23 13:25:20,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:25:20,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366390349] [2022-07-23 13:25:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:25:20,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:25:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:25:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 0 proven. 36520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:25:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:25:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366390349] [2022-07-23 13:25:31,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366390349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:25:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130761541] [2022-07-23 13:25:31,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 13:25:31,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:25:31,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:25:31,487 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:25:31,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 13:25:32,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 111 check-sat command(s) [2022-07-23 13:25:32,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:25:32,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 224 conjunts are in the unsatisfiable core [2022-07-23 13:25:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:25:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 0 proven. 36520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:25:32,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:25:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 0 proven. 36520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:25:49,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130761541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:25:49,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:25:49,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [224, 224, 224] total 447 [2022-07-23 13:25:49,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576903564] [2022-07-23 13:25:49,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:25:49,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 448 states [2022-07-23 13:25:49,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:25:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 448 interpolants. [2022-07-23 13:25:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25316, Invalid=174940, Unknown=0, NotChecked=0, Total=200256 [2022-07-23 13:25:49,252 INFO L87 Difference]: Start difference. First operand 2022 states and 2052 transitions. Second operand has 448 states, 445 states have (on average 2.5033707865168537) internal successors, (1114), 226 states have internal predecessors, (1114), 222 states have call successors, (222), 222 states have call predecessors, (222), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:26:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 13:26:17,407 INFO L93 Difference]: Finished difference Result 2374 states and 2430 transitions. [2022-07-23 13:26:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 557 states. [2022-07-23 13:26:17,408 INFO L78 Accepts]: Start accepts. Automaton has has 448 states, 445 states have (on average 2.5033707865168537) internal successors, (1114), 226 states have internal predecessors, (1114), 222 states have call successors, (222), 222 states have call predecessors, (222), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 669 [2022-07-23 13:26:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 13:26:17,436 INFO L225 Difference]: With dead ends: 2374 [2022-07-23 13:26:17,436 INFO L226 Difference]: Without dead ends: 2373 [2022-07-23 13:26:17,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1114 SyntacticMatches, 0 SemanticMatches, 778 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196787 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=87590, Invalid=520030, Unknown=0, NotChecked=0, Total=607620 [2022-07-23 13:26:17,471 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4926 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4926 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 13:26:17,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4926 Valid, 1060 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 13:26:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-07-23 13:26:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2340. [2022-07-23 13:26:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 1950 states have (on average 1.0143589743589743) internal successors, (1978), 1950 states have internal predecessors, (1978), 389 states have call successors, (389), 389 states have call predecessors, (389), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:26:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 2367 transitions. [2022-07-23 13:26:17,826 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 2367 transitions. Word has length 669 [2022-07-23 13:26:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 13:26:17,826 INFO L495 AbstractCegarLoop]: Abstraction has 2340 states and 2367 transitions. [2022-07-23 13:26:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 448 states, 445 states have (on average 2.5033707865168537) internal successors, (1114), 226 states have internal predecessors, (1114), 222 states have call successors, (222), 222 states have call predecessors, (222), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 13:26:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 2367 transitions. [2022-07-23 13:26:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2022-07-23 13:26:17,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 13:26:17,836 INFO L195 NwaCegarLoop]: trace histogram [170, 170, 169, 169, 168, 168, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 13:26:17,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-23 13:26:18,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-23 13:26:18,052 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-23 13:26:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 13:26:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2144916318, now seen corresponding path program 8 times [2022-07-23 13:26:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 13:26:18,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525738643] [2022-07-23 13:26:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 13:26:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 13:26:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 13:26:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 85515 backedges. 0 proven. 85515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:26:33,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 13:26:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525738643] [2022-07-23 13:26:33,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525738643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 13:26:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417010280] [2022-07-23 13:26:33,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 13:26:33,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 13:26:33,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 13:26:33,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 13:26:33,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 13:26:34,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 13:26:34,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 13:26:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 2390 conjuncts, 342 conjunts are in the unsatisfiable core [2022-07-23 13:26:34,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 13:26:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 85515 backedges. 0 proven. 85515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:26:34,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 13:27:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 85515 backedges. 0 proven. 85515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 13:27:08,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417010280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 13:27:08,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 13:27:08,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [342, 342, 342] total 683 [2022-07-23 13:27:08,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97167065] [2022-07-23 13:27:08,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 13:27:08,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 684 states [2022-07-23 13:27:08,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 13:27:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 684 interpolants. [2022-07-23 13:27:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58826, Invalid=408346, Unknown=0, NotChecked=0, Total=467172 [2022-07-23 13:27:08,923 INFO L87 Difference]: Start difference. First operand 2340 states and 2367 transitions. Second operand has 684 states, 681 states have (on average 2.502202643171806) internal successors, (1704), 344 states have internal predecessors, (1704), 340 states have call successors, (340), 340 states have call predecessors, (340), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)