./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/rec_counter3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/rec_counter3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 20:47:12,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 20:47:12,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 20:47:12,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 20:47:12,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 20:47:12,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 20:47:12,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 20:47:12,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 20:47:12,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 20:47:12,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 20:47:12,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 20:47:12,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 20:47:12,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 20:47:12,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 20:47:12,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 20:47:12,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 20:47:12,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 20:47:12,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 20:47:12,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 20:47:12,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 20:47:12,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 20:47:12,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 20:47:12,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 20:47:12,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 20:47:12,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 20:47:12,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 20:47:12,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 20:47:12,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 20:47:12,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 20:47:12,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 20:47:12,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 20:47:12,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 20:47:12,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 20:47:12,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 20:47:12,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 20:47:12,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 20:47:12,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 20:47:12,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 20:47:12,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 20:47:12,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 20:47:12,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 20:47:12,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-21 20:47:12,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 20:47:12,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 20:47:12,256 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 20:47:12,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 20:47:12,257 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 20:47:12,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 20:47:12,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 20:47:12,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 20:47:12,258 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 20:47:12,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 20:47:12,259 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 20:47:12,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 20:47:12,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 20:47:12,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 20:47:12,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 20:47:12,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 20:47:12,260 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-21 20:47:12,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 20:47:12,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 20:47:12,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 20:47:12,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 20:47:12,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 20:47:12,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 20:47:12,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:47:12,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 20:47:12,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 20:47:12,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 20:47:12,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 20:47:12,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 20:47:12,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 20:47:12,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 20:47:12,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 [2021-12-21 20:47:12,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 20:47:12,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 20:47:12,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 20:47:12,479 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 20:47:12,480 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 20:47:12,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/rec_counter3.c [2021-12-21 20:47:12,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dbddc41d/0b557b9a9e7046b4b3aefa461c4730ae/FLAGc27243658 [2021-12-21 20:47:12,866 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 20:47:12,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/rec_counter3.c [2021-12-21 20:47:12,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dbddc41d/0b557b9a9e7046b4b3aefa461c4730ae/FLAGc27243658 [2021-12-21 20:47:13,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dbddc41d/0b557b9a9e7046b4b3aefa461c4730ae [2021-12-21 20:47:13,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 20:47:13,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 20:47:13,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 20:47:13,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 20:47:13,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 20:47:13,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2697c9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13, skipping insertion in model container [2021-12-21 20:47:13,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 20:47:13,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 20:47:13,451 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:47:13,455 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 20:47:13,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:47:13,483 INFO L208 MainTranslator]: Completed translation [2021-12-21 20:47:13,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13 WrapperNode [2021-12-21 20:47:13,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 20:47:13,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 20:47:13,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 20:47:13,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 20:47:13,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,514 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2021-12-21 20:47:13,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 20:47:13,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 20:47:13,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 20:47:13,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 20:47:13,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 20:47:13,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 20:47:13,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 20:47:13,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 20:47:13,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (1/1) ... [2021-12-21 20:47:13,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:47:13,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:13,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 20:47:13,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 20:47:13,628 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-12-21 20:47:13,628 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-12-21 20:47:13,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 20:47:13,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 20:47:13,669 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 20:47:13,671 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 20:47:13,745 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 20:47:13,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 20:47:13,751 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 20:47:13,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:47:13 BoogieIcfgContainer [2021-12-21 20:47:13,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 20:47:13,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 20:47:13,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 20:47:13,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 20:47:13,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 08:47:13" (1/3) ... [2021-12-21 20:47:13,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505a3d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:47:13, skipping insertion in model container [2021-12-21 20:47:13,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:13" (2/3) ... [2021-12-21 20:47:13,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505a3d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:47:13, skipping insertion in model container [2021-12-21 20:47:13,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:47:13" (3/3) ... [2021-12-21 20:47:13,759 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_counter3.c [2021-12-21 20:47:13,763 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 20:47:13,764 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-12-21 20:47:13,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 20:47:13,813 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 20:47:13,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-12-21 20:47:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 20:47:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 20:47:13,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:13,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:13,830 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1089293515, now seen corresponding path program 1 times [2021-12-21 20:47:13,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:13,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021331600] [2021-12-21 20:47:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:13,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:47:14,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:14,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021331600] [2021-12-21 20:47:14,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021331600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:14,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:14,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:47:14,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965258030] [2021-12-21 20:47:14,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:14,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:47:14,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:14,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:47:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:14,077 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:47:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:14,171 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-12-21 20:47:14,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 20:47:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:14,178 INFO L225 Difference]: With dead ends: 45 [2021-12-21 20:47:14,178 INFO L226 Difference]: Without dead ends: 22 [2021-12-21 20:47:14,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:47:14,183 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:14,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 50 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-21 20:47:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-21 20:47:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-21 20:47:14,211 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2021-12-21 20:47:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:14,212 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-21 20:47:14,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:47:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-21 20:47:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 20:47:14,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:14,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:14,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 20:47:14,214 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:14,214 INFO L85 PathProgramCache]: Analyzing trace with hash -591639365, now seen corresponding path program 1 times [2021-12-21 20:47:14,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:14,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393745770] [2021-12-21 20:47:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:14,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:47:14,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:14,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393745770] [2021-12-21 20:47:14,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393745770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:14,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:14,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:47:14,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233451425] [2021-12-21 20:47:14,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:14,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:47:14,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:14,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:47:14,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:14,250 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:47:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:14,282 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-12-21 20:47:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-21 20:47:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:14,284 INFO L225 Difference]: With dead ends: 42 [2021-12-21 20:47:14,284 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 20:47:14,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 20:47:14,285 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:14,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 20:47:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-21 20:47:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 20:47:14,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-12-21 20:47:14,294 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2021-12-21 20:47:14,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:14,294 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-12-21 20:47:14,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:47:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-12-21 20:47:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 20:47:14,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:14,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 20:47:14,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1393066815, now seen corresponding path program 1 times [2021-12-21 20:47:14,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:14,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498006385] [2021-12-21 20:47:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:14,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:47:14,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:14,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498006385] [2021-12-21 20:47:14,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498006385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:14,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843851371] [2021-12-21 20:47:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:14,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:14,383 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:14,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 20:47:14,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 20:47:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:47:14,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 20:47:14,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843851371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:14,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:14,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-21 20:47:14,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519659596] [2021-12-21 20:47:14,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:14,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 20:47:14,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 20:47:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-21 20:47:14,622 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:47:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:14,708 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-21 20:47:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:47:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 20:47:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:14,712 INFO L225 Difference]: With dead ends: 39 [2021-12-21 20:47:14,713 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 20:47:14,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-12-21 20:47:14,715 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:14,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 57 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 20:47:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-21 20:47:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 20:47:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-21 20:47:14,729 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 13 [2021-12-21 20:47:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:14,729 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-21 20:47:14,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 20:47:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-21 20:47:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 20:47:14,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:14,731 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:14,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 20:47:14,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:14,943 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1411454171, now seen corresponding path program 1 times [2021-12-21 20:47:14,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:14,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995855482] [2021-12-21 20:47:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:14,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 20:47:15,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:15,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995855482] [2021-12-21 20:47:15,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995855482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:15,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:15,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:47:15,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940601909] [2021-12-21 20:47:15,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:15,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:47:15,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:15,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:47:15,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:47:15,015 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:15,040 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-21 20:47:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-21 20:47:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:15,042 INFO L225 Difference]: With dead ends: 48 [2021-12-21 20:47:15,042 INFO L226 Difference]: Without dead ends: 47 [2021-12-21 20:47:15,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:15,050 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:15,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 54 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-21 20:47:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-12-21 20:47:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 31 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 20:47:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-12-21 20:47:15,064 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 16 [2021-12-21 20:47:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:15,065 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-12-21 20:47:15,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-12-21 20:47:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 20:47:15,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:15,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:15,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 20:47:15,067 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:15,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1411454226, now seen corresponding path program 1 times [2021-12-21 20:47:15,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:15,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650523131] [2021-12-21 20:47:15,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:15,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 20:47:15,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:15,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650523131] [2021-12-21 20:47:15,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650523131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:15,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:15,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 20:47:15,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079827532] [2021-12-21 20:47:15,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:15,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:47:15,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:47:15,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:15,145 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:15,160 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-12-21 20:47:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-21 20:47:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:15,162 INFO L225 Difference]: With dead ends: 64 [2021-12-21 20:47:15,162 INFO L226 Difference]: Without dead ends: 42 [2021-12-21 20:47:15,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:15,164 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:15,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-21 20:47:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-21 20:47:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 20:47:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-12-21 20:47:15,171 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 16 [2021-12-21 20:47:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:15,171 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-12-21 20:47:15,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-12-21 20:47:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 20:47:15,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:15,172 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:15,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 20:47:15,173 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash 805406401, now seen corresponding path program 1 times [2021-12-21 20:47:15,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:15,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133350602] [2021-12-21 20:47:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:15,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 20:47:15,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:15,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133350602] [2021-12-21 20:47:15,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133350602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:15,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:15,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:47:15,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046700347] [2021-12-21 20:47:15,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:15,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 20:47:15,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 20:47:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:47:15,207 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:15,214 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-21 20:47:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 20:47:15,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-21 20:47:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:15,215 INFO L225 Difference]: With dead ends: 42 [2021-12-21 20:47:15,215 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 20:47:15,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:47:15,216 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:15,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 20:47:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-21 20:47:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 20:47:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-12-21 20:47:15,223 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 17 [2021-12-21 20:47:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:15,223 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-12-21 20:47:15,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-12-21 20:47:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 20:47:15,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:15,224 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:15,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 20:47:15,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:15,225 INFO L85 PathProgramCache]: Analyzing trace with hash 719911349, now seen corresponding path program 1 times [2021-12-21 20:47:15,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:15,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820974639] [2021-12-21 20:47:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:15,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 20:47:15,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:15,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820974639] [2021-12-21 20:47:15,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820974639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:15,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976666486] [2021-12-21 20:47:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:15,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:15,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:15,348 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:15,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 20:47:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 20:47:15,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 20:47:15,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:47:15,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976666486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:15,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:47:15,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2021-12-21 20:47:15,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847860259] [2021-12-21 20:47:15,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:15,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 20:47:15,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 20:47:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-21 20:47:15,491 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 20:47:15,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:15,545 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-12-21 20:47:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:47:15,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-12-21 20:47:15,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:15,548 INFO L225 Difference]: With dead ends: 37 [2021-12-21 20:47:15,548 INFO L226 Difference]: Without dead ends: 36 [2021-12-21 20:47:15,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-12-21 20:47:15,549 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:15,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-21 20:47:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-21 20:47:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 20:47:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-21 20:47:15,567 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 27 [2021-12-21 20:47:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:15,567 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-21 20:47:15,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 20:47:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-21 20:47:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 20:47:15,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:15,569 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:15,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:15,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-21 20:47:15,791 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash 842415392, now seen corresponding path program 1 times [2021-12-21 20:47:15,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:15,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799269162] [2021-12-21 20:47:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:15,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 20:47:15,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799269162] [2021-12-21 20:47:15,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799269162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:15,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:15,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:47:15,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368655995] [2021-12-21 20:47:15,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:15,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 20:47:15,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 20:47:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:47:15,836 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:15,842 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-12-21 20:47:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 20:47:15,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-21 20:47:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:15,843 INFO L225 Difference]: With dead ends: 36 [2021-12-21 20:47:15,843 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 20:47:15,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:47:15,844 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:15,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 20:47:15,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-21 20:47:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 20:47:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-21 20:47:15,857 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2021-12-21 20:47:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:15,858 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-21 20:47:15,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 20:47:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-21 20:47:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 20:47:15,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:15,863 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:15,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 20:47:15,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:15,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2107341579, now seen corresponding path program 1 times [2021-12-21 20:47:15,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158585581] [2021-12-21 20:47:15,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:15,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 20:47:15,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:15,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158585581] [2021-12-21 20:47:15,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158585581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:15,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738736867] [2021-12-21 20:47:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:15,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:15,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:15,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 20:47:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 20:47:15,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 20:47:16,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 20:47:16,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738736867] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:16,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:16,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2021-12-21 20:47:16,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117874272] [2021-12-21 20:47:16,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:16,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 20:47:16,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 20:47:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-21 20:47:16,258 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 20:47:16,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:16,487 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2021-12-21 20:47:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 20:47:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2021-12-21 20:47:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:16,491 INFO L225 Difference]: With dead ends: 122 [2021-12-21 20:47:16,491 INFO L226 Difference]: Without dead ends: 89 [2021-12-21 20:47:16,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-12-21 20:47:16,495 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:16,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 146 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-21 20:47:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-12-21 20:47:16,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 20:47:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-12-21 20:47:16,518 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 30 [2021-12-21 20:47:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:16,518 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-12-21 20:47:16,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 20:47:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-12-21 20:47:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 20:47:16,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:16,521 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:16,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:16,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:16,732 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash 164414216, now seen corresponding path program 2 times [2021-12-21 20:47:16,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:16,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855424275] [2021-12-21 20:47:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:16,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:16,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:16,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:16,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:16,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 100 proven. 42 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 20:47:17,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:17,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855424275] [2021-12-21 20:47:17,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855424275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:17,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292228114] [2021-12-21 20:47:17,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:47:17,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:17,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:17,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 20:47:17,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:47:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:17,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 20:47:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 107 proven. 35 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 20:47:17,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 107 proven. 35 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 20:47:17,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292228114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:17,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:17,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 23 [2021-12-21 20:47:17,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228827684] [2021-12-21 20:47:17,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:17,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 20:47:17,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 20:47:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-21 20:47:17,878 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 18 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 20:47:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:18,062 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2021-12-21 20:47:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 20:47:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 18 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 91 [2021-12-21 20:47:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:18,063 INFO L225 Difference]: With dead ends: 139 [2021-12-21 20:47:18,063 INFO L226 Difference]: Without dead ends: 83 [2021-12-21 20:47:18,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-12-21 20:47:18,065 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:18,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 210 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-21 20:47:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-21 20:47:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 20:47:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-12-21 20:47:18,072 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 91 [2021-12-21 20:47:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:18,073 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-12-21 20:47:18,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 18 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 20:47:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-12-21 20:47:18,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 20:47:18,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:18,074 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:18,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:18,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:18,297 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash -594461554, now seen corresponding path program 3 times [2021-12-21 20:47:18,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809057483] [2021-12-21 20:47:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:18,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:18,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:18,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:18,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:18,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:18,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-21 20:47:18,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809057483] [2021-12-21 20:47:18,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809057483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546805854] [2021-12-21 20:47:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:47:18,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:18,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:18,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 20:47:18,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 20:47:18,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 20:47:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 80 proven. 12 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-12-21 20:47:18,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 80 proven. 12 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-12-21 20:47:19,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546805854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:19,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:19,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2021-12-21 20:47:19,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272703569] [2021-12-21 20:47:19,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:19,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 20:47:19,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 20:47:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-12-21 20:47:19,078 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 20:47:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:19,537 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2021-12-21 20:47:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-21 20:47:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 97 [2021-12-21 20:47:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:19,538 INFO L225 Difference]: With dead ends: 148 [2021-12-21 20:47:19,538 INFO L226 Difference]: Without dead ends: 130 [2021-12-21 20:47:19,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 20:47:19,541 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 212 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:19,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 153 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-21 20:47:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-12-21 20:47:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 115 states have internal predecessors, (128), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 7 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 20:47:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2021-12-21 20:47:19,560 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 97 [2021-12-21 20:47:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:19,560 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2021-12-21 20:47:19,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 27 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 20:47:19,561 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2021-12-21 20:47:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-21 20:47:19,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:19,562 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 9, 8, 8, 8, 8, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:19,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 20:47:19,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 20:47:19,776 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash -802253237, now seen corresponding path program 4 times [2021-12-21 20:47:19,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:19,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439460359] [2021-12-21 20:47:19,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:19,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:19,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:19,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:19,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:19,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:20,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-12-21 20:47:20,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439460359] [2021-12-21 20:47:20,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439460359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:20,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25960936] [2021-12-21 20:47:20,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 20:47:20,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:20,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:20,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:20,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 20:47:20,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 20:47:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:20,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 20:47:20,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 0 proven. 485 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-12-21 20:47:20,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 751 backedges. 0 proven. 485 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-12-21 20:47:21,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25960936] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:21,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:21,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 41 [2021-12-21 20:47:21,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600798159] [2021-12-21 20:47:21,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:21,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-21 20:47:21,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-21 20:47:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 20:47:21,615 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 42 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 20:47:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:21,870 INFO L93 Difference]: Finished difference Result 638 states and 722 transitions. [2021-12-21 20:47:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-21 20:47:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 132 [2021-12-21 20:47:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:21,874 INFO L225 Difference]: With dead ends: 638 [2021-12-21 20:47:21,874 INFO L226 Difference]: Without dead ends: 469 [2021-12-21 20:47:21,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=625, Invalid=2681, Unknown=0, NotChecked=0, Total=3306 [2021-12-21 20:47:21,877 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:21,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 242 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-21 20:47:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 230. [2021-12-21 20:47:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 213 states have (on average 1.0938967136150235) internal successors, (233), 213 states have internal predecessors, (233), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 14 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 20:47:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 250 transitions. [2021-12-21 20:47:21,894 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 250 transitions. Word has length 132 [2021-12-21 20:47:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:21,894 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 250 transitions. [2021-12-21 20:47:21,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-12-21 20:47:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 250 transitions. [2021-12-21 20:47:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-21 20:47:21,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:21,898 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:21,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:22,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:22,120 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1517932895, now seen corresponding path program 5 times [2021-12-21 20:47:22,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485523704] [2021-12-21 20:47:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:22,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3475 backedges. 1751 proven. 51 refuted. 0 times theorem prover too weak. 1673 trivial. 0 not checked. [2021-12-21 20:47:22,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:22,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485523704] [2021-12-21 20:47:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485523704] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:22,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566572161] [2021-12-21 20:47:22,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 20:47:22,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:22,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:22,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 20:47:22,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-21 20:47:22,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:22,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 20:47:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3475 backedges. 1319 proven. 88 refuted. 0 times theorem prover too weak. 2068 trivial. 0 not checked. [2021-12-21 20:47:23,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3475 backedges. 1337 proven. 70 refuted. 0 times theorem prover too weak. 2068 trivial. 0 not checked. [2021-12-21 20:47:24,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566572161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:24,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:24,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 27 [2021-12-21 20:47:24,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26864265] [2021-12-21 20:47:24,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:24,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 20:47:24,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 20:47:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-12-21 20:47:24,581 INFO L87 Difference]: Start difference. First operand 230 states and 250 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 20:47:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:24,984 INFO L93 Difference]: Finished difference Result 492 states and 542 transitions. [2021-12-21 20:47:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 20:47:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 262 [2021-12-21 20:47:24,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:24,987 INFO L225 Difference]: With dead ends: 492 [2021-12-21 20:47:24,987 INFO L226 Difference]: Without dead ends: 301 [2021-12-21 20:47:24,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 540 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2021-12-21 20:47:24,989 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:24,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 261 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:47:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-21 20:47:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2021-12-21 20:47:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 268 states have (on average 1.078358208955224) internal successors, (289), 268 states have internal predecessors, (289), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 20:47:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 309 transitions. [2021-12-21 20:47:25,008 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 309 transitions. Word has length 262 [2021-12-21 20:47:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:25,008 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 309 transitions. [2021-12-21 20:47:25,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 20:47:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 309 transitions. [2021-12-21 20:47:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-21 20:47:25,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:25,012 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:25,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:25,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:25,219 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:25,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2101259226, now seen corresponding path program 6 times [2021-12-21 20:47:25,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:25,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642761481] [2021-12-21 20:47:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:25,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4427 backedges. 1945 proven. 90 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2021-12-21 20:47:25,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:25,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642761481] [2021-12-21 20:47:25,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642761481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:25,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419616920] [2021-12-21 20:47:25,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 20:47:25,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:25,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:25,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:25,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 20:47:25,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-21 20:47:25,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 20:47:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4427 backedges. 1402 proven. 119 refuted. 0 times theorem prover too weak. 2906 trivial. 0 not checked. [2021-12-21 20:47:26,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4427 backedges. 1402 proven. 119 refuted. 0 times theorem prover too weak. 2906 trivial. 0 not checked. [2021-12-21 20:47:27,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419616920] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:27,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:27,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2021-12-21 20:47:27,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222024318] [2021-12-21 20:47:27,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:27,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-21 20:47:27,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-21 20:47:27,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2021-12-21 20:47:27,357 INFO L87 Difference]: Start difference. First operand 288 states and 309 transitions. Second operand has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 44 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 20:47:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:29,289 INFO L93 Difference]: Finished difference Result 1217 states and 1388 transitions. [2021-12-21 20:47:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-21 20:47:29,289 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 44 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 283 [2021-12-21 20:47:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:29,294 INFO L225 Difference]: With dead ends: 1217 [2021-12-21 20:47:29,294 INFO L226 Difference]: Without dead ends: 971 [2021-12-21 20:47:29,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2102, Invalid=12178, Unknown=0, NotChecked=0, Total=14280 [2021-12-21 20:47:29,300 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 386 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:29,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 392 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 20:47:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-12-21 20:47:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 380. [2021-12-21 20:47:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 357 states have (on average 1.0812324929971988) internal successors, (386), 357 states have internal predecessors, (386), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 20 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 20:47:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 409 transitions. [2021-12-21 20:47:29,345 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 409 transitions. Word has length 283 [2021-12-21 20:47:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:29,345 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 409 transitions. [2021-12-21 20:47:29,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 44 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 20:47:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 409 transitions. [2021-12-21 20:47:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-21 20:47:29,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:29,349 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:29,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:29,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 20:47:29,573 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash -850417349, now seen corresponding path program 7 times [2021-12-21 20:47:29,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:29,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239040997] [2021-12-21 20:47:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:29,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:29,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6585 backedges. 3710 proven. 138 refuted. 0 times theorem prover too weak. 2737 trivial. 0 not checked. [2021-12-21 20:47:30,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:30,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239040997] [2021-12-21 20:47:30,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239040997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:30,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326827674] [2021-12-21 20:47:30,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 20:47:30,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:30,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:30,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:30,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 20:47:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:30,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 20:47:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6585 backedges. 3350 proven. 311 refuted. 0 times theorem prover too weak. 2924 trivial. 0 not checked. [2021-12-21 20:47:31,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6585 backedges. 3350 proven. 311 refuted. 0 times theorem prover too weak. 2924 trivial. 0 not checked. [2021-12-21 20:47:35,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326827674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:35,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:35,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 33] total 44 [2021-12-21 20:47:35,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769616813] [2021-12-21 20:47:35,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:35,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-21 20:47:35,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-21 20:47:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 20:47:35,210 INFO L87 Difference]: Start difference. First operand 380 states and 409 transitions. Second operand has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 37 states have internal predecessors, (107), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-21 20:47:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:36,485 INFO L93 Difference]: Finished difference Result 787 states and 849 transitions. [2021-12-21 20:47:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-21 20:47:36,486 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 37 states have internal predecessors, (107), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) Word has length 322 [2021-12-21 20:47:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:36,488 INFO L225 Difference]: With dead ends: 787 [2021-12-21 20:47:36,488 INFO L226 Difference]: Without dead ends: 521 [2021-12-21 20:47:36,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 653 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1171, Invalid=7759, Unknown=0, NotChecked=0, Total=8930 [2021-12-21 20:47:36,492 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:36,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 460 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 20:47:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-21 20:47:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 469. [2021-12-21 20:47:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 442 states have (on average 1.0701357466063348) internal successors, (473), 442 states have internal predecessors, (473), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-12-21 20:47:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 500 transitions. [2021-12-21 20:47:36,547 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 500 transitions. Word has length 322 [2021-12-21 20:47:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:36,547 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 500 transitions. [2021-12-21 20:47:36,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 37 states have internal predecessors, (107), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-21 20:47:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 500 transitions. [2021-12-21 20:47:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-12-21 20:47:36,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:36,553 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:36,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:36,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 20:47:36,776 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash -200847262, now seen corresponding path program 8 times [2021-12-21 20:47:36,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:36,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820776959] [2021-12-21 20:47:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:36,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7550 backedges. 4312 proven. 195 refuted. 0 times theorem prover too weak. 3043 trivial. 0 not checked. [2021-12-21 20:47:37,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820776959] [2021-12-21 20:47:37,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820776959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:37,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340074324] [2021-12-21 20:47:37,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:47:37,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:37,575 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:37,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 20:47:37,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:47:37,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 20:47:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7550 backedges. 4374 proven. 499 refuted. 0 times theorem prover too weak. 2677 trivial. 0 not checked. [2021-12-21 20:47:38,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7550 backedges. 4374 proven. 499 refuted. 0 times theorem prover too weak. 2677 trivial. 0 not checked. [2021-12-21 20:47:43,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340074324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:43,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:43,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38, 38] total 51 [2021-12-21 20:47:43,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366414472] [2021-12-21 20:47:43,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:43,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-21 20:47:43,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-21 20:47:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2021-12-21 20:47:43,444 INFO L87 Difference]: Start difference. First operand 469 states and 500 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 43 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 20:47:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:45,282 INFO L93 Difference]: Finished difference Result 958 states and 1021 transitions. [2021-12-21 20:47:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-21 20:47:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 43 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 337 [2021-12-21 20:47:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:45,286 INFO L225 Difference]: With dead ends: 958 [2021-12-21 20:47:45,286 INFO L226 Difference]: Without dead ends: 668 [2021-12-21 20:47:45,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 680 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3934 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1769, Invalid=12037, Unknown=0, NotChecked=0, Total=13806 [2021-12-21 20:47:45,291 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 2003 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:45,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 505 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2003 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 20:47:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-21 20:47:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 588. [2021-12-21 20:47:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 556 states have (on average 1.0611510791366907) internal successors, (590), 556 states have internal predecessors, (590), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 29 states have call predecessors, (29), 2 states have call successors, (29) [2021-12-21 20:47:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 622 transitions. [2021-12-21 20:47:45,342 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 622 transitions. Word has length 337 [2021-12-21 20:47:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:45,343 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 622 transitions. [2021-12-21 20:47:45,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 43 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 20:47:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 622 transitions. [2021-12-21 20:47:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-21 20:47:45,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:45,346 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 16, 15, 15, 15, 15, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:45,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:45,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 20:47:45,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1183428946, now seen corresponding path program 9 times [2021-12-21 20:47:45,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:45,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059485589] [2021-12-21 20:47:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:45,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:45,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:45,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 4853 proven. 261 refuted. 0 times theorem prover too weak. 3401 trivial. 0 not checked. [2021-12-21 20:47:46,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059485589] [2021-12-21 20:47:46,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059485589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:46,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971093784] [2021-12-21 20:47:46,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:47:46,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:46,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:46,472 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:46,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 20:47:46,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-21 20:47:46,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 20:47:46,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 1756 proven. 117 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2021-12-21 20:47:47,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 1756 proven. 117 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2021-12-21 20:47:48,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971093784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:48,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:48,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 21] total 73 [2021-12-21 20:47:48,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234270083] [2021-12-21 20:47:48,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:48,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-21 20:47:48,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:48,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-21 20:47:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=4528, Unknown=0, NotChecked=0, Total=5256 [2021-12-21 20:47:48,775 INFO L87 Difference]: Start difference. First operand 588 states and 622 transitions. Second operand has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 72 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 20:47:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:51,041 INFO L93 Difference]: Finished difference Result 1739 states and 1954 transitions. [2021-12-21 20:47:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-21 20:47:51,042 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 72 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 359 [2021-12-21 20:47:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:51,047 INFO L225 Difference]: With dead ends: 1739 [2021-12-21 20:47:51,047 INFO L226 Difference]: Without dead ends: 1423 [2021-12-21 20:47:51,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4627 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3164, Invalid=16296, Unknown=0, NotChecked=0, Total=19460 [2021-12-21 20:47:51,052 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 607 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:51,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 514 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 20:47:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-12-21 20:47:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 803. [2021-12-21 20:47:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 765 states have (on average 1.0627450980392157) internal successors, (813), 765 states have internal predecessors, (813), 3 states have call successors, (3), 2 states have call predecessors, (3), 34 states have return successors, (35), 35 states have call predecessors, (35), 2 states have call successors, (35) [2021-12-21 20:47:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 851 transitions. [2021-12-21 20:47:51,150 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 851 transitions. Word has length 359 [2021-12-21 20:47:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:51,150 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 851 transitions. [2021-12-21 20:47:51,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 72 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 20:47:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 851 transitions. [2021-12-21 20:47:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-21 20:47:51,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:51,155 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:51,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:51,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 20:47:51,371 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash 229112565, now seen corresponding path program 10 times [2021-12-21 20:47:51,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:51,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998244436] [2021-12-21 20:47:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:51,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:51,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:51,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:51,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11392 backedges. 6985 proven. 336 refuted. 0 times theorem prover too weak. 4071 trivial. 0 not checked. [2021-12-21 20:47:52,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:52,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998244436] [2021-12-21 20:47:52,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998244436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:52,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454850825] [2021-12-21 20:47:52,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 20:47:52,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:52,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:52,307 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:52,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 20:47:52,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 20:47:52,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:52,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 20:47:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11392 backedges. 7596 proven. 1073 refuted. 0 times theorem prover too weak. 2723 trivial. 0 not checked. [2021-12-21 20:47:53,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:48:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11392 backedges. 7596 proven. 1073 refuted. 0 times theorem prover too weak. 2723 trivial. 0 not checked. [2021-12-21 20:48:00,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454850825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:48:00,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:48:00,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 48, 48] total 65 [2021-12-21 20:48:00,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918722767] [2021-12-21 20:48:00,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:48:00,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-21 20:48:00,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:48:00,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-21 20:48:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=3770, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 20:48:00,015 INFO L87 Difference]: Start difference. First operand 803 states and 851 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 55 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-21 20:48:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:48:03,254 INFO L93 Difference]: Finished difference Result 1552 states and 1640 transitions. [2021-12-21 20:48:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-21 20:48:03,255 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 55 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) Word has length 388 [2021-12-21 20:48:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:48:03,260 INFO L225 Difference]: With dead ends: 1552 [2021-12-21 20:48:03,260 INFO L226 Difference]: Without dead ends: 1154 [2021-12-21 20:48:03,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 776 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8655 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3583, Invalid=25147, Unknown=0, NotChecked=0, Total=28730 [2021-12-21 20:48:03,265 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 108 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 3807 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:48:03,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 683 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3807 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 20:48:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-12-21 20:48:03,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1000. [2021-12-21 20:48:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 955 states have (on average 1.0554973821989528) internal successors, (1008), 955 states have internal predecessors, (1008), 3 states have call successors, (3), 2 states have call predecessors, (3), 41 states have return successors, (42), 42 states have call predecessors, (42), 2 states have call successors, (42) [2021-12-21 20:48:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1053 transitions. [2021-12-21 20:48:03,408 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1053 transitions. Word has length 388 [2021-12-21 20:48:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:48:03,409 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 1053 transitions. [2021-12-21 20:48:03,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 55 states have internal predecessors, (149), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-21 20:48:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1053 transitions. [2021-12-21 20:48:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-12-21 20:48:03,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:48:03,415 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 16, 15, 15, 15, 15, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:48:03,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 20:48:03,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 20:48:03,639 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:48:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:48:03,640 INFO L85 PathProgramCache]: Analyzing trace with hash -70699781, now seen corresponding path program 11 times [2021-12-21 20:48:03,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:48:03,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045273460] [2021-12-21 20:48:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:48:03,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:48:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:03,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:48:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:48:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:48:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12040 backedges. 6812 proven. 420 refuted. 0 times theorem prover too weak. 4808 trivial. 0 not checked. [2021-12-21 20:48:04,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:48:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045273460] [2021-12-21 20:48:04,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045273460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:48:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966898783] [2021-12-21 20:48:04,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 20:48:04,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:48:04,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:48:04,593 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:48:04,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 20:48:04,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-21 20:48:04,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:48:05,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 20:48:05,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:48:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12040 backedges. 8259 proven. 1615 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2021-12-21 20:48:05,966 INFO L328 TraceCheckSpWp]: Computing backward predicates...