./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/rec_counter1.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_counter1.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 de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 20:47:02,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 20:47:02,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 20:47:02,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 20:47:02,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 20:47:02,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 20:47:02,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 20:47:02,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 20:47:02,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 20:47:02,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 20:47:02,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 20:47:02,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 20:47:02,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 20:47:02,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 20:47:02,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 20:47:02,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 20:47:02,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 20:47:02,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 20:47:02,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 20:47:02,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 20:47:02,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 20:47:02,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 20:47:02,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 20:47:02,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 20:47:02,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 20:47:02,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 20:47:02,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 20:47:02,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 20:47:02,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 20:47:02,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 20:47:02,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 20:47:02,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 20:47:02,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 20:47:02,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 20:47:02,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 20:47:02,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 20:47:02,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 20:47:02,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 20:47:02,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 20:47:02,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 20:47:02,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 20:47:02,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-21 20:47:02,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 20:47:02,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 20:47:02,369 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 20:47:02,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 20:47:02,370 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 20:47:02,370 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 20:47:02,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 20:47:02,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 20:47:02,371 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 20:47:02,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 20:47:02,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 20:47:02,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 20:47:02,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 20:47:02,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 20:47:02,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 20:47:02,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 20:47:02,373 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-21 20:47:02,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 20:47:02,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 20:47:02,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 20:47:02,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 20:47:02,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 20:47:02,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 20:47:02,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:47:02,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 20:47:02,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 20:47:02,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 20:47:02,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 20:47:02,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 20:47:02,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 20:47:02,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 20:47:02,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b [2021-12-21 20:47:02,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 20:47:02,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 20:47:02,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 20:47:02,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 20:47:02,552 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 20:47:02,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-12-21 20:47:02,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/782b66054/e3a643c4e55e4a3c928f481aea8050a6/FLAGf168a23bf [2021-12-21 20:47:02,917 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 20:47:02,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-12-21 20:47:02,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/782b66054/e3a643c4e55e4a3c928f481aea8050a6/FLAGf168a23bf [2021-12-21 20:47:02,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/782b66054/e3a643c4e55e4a3c928f481aea8050a6 [2021-12-21 20:47:02,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 20:47:02,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 20:47:02,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 20:47:02,935 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 20:47:02,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 20:47:02,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:47:02" (1/1) ... [2021-12-21 20:47:02,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672a0ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:02, skipping insertion in model container [2021-12-21 20:47:02,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:47:02" (1/1) ... [2021-12-21 20:47:02,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 20:47:02,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 20:47:03,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:47:03,068 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 20:47:03,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 20:47:03,085 INFO L208 MainTranslator]: Completed translation [2021-12-21 20:47:03,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03 WrapperNode [2021-12-21 20:47:03,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 20:47:03,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 20:47:03,087 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 20:47:03,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 20:47:03,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,103 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 12 [2021-12-21 20:47:03,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 20:47:03,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 20:47:03,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 20:47:03,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 20:47:03,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 20:47:03,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 20:47:03,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 20:47:03,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 20:47:03,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (1/1) ... [2021-12-21 20:47:03,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 20:47:03,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:03,142 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 20:47:03,148 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 20:47:03,172 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-12-21 20:47:03,173 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-12-21 20:47:03,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 20:47:03,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 20:47:03,205 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 20:47:03,206 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 20:47:03,317 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 20:47:03,323 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 20:47:03,324 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 20:47:03,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:47:03 BoogieIcfgContainer [2021-12-21 20:47:03,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 20:47:03,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 20:47:03,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 20:47:03,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 20:47:03,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 08:47:02" (1/3) ... [2021-12-21 20:47:03,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206bcd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:47:03, skipping insertion in model container [2021-12-21 20:47:03,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:47:03" (2/3) ... [2021-12-21 20:47:03,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206bcd7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:47:03, skipping insertion in model container [2021-12-21 20:47:03,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:47:03" (3/3) ... [2021-12-21 20:47:03,332 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_counter1.c [2021-12-21 20:47:03,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 20:47:03,336 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-12-21 20:47:03,376 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 20:47:03,386 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 20:47:03,386 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-12-21 20:47:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.588235294117647) internal successors, (27), 23 states have internal predecessors, (27), 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 20:47:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 20:47:03,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:03,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:03,414 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:03,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1088965814, now seen corresponding path program 1 times [2021-12-21 20:47:03,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:03,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979975753] [2021-12-21 20:47:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:03,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:03,566 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 20:47:03,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:03,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979975753] [2021-12-21 20:47:03,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979975753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:03,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:03,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:47:03,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250565843] [2021-12-21 20:47:03,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:03,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:47:03,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:03,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:47:03,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:03,619 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.588235294117647) internal successors, (27), 23 states have internal predecessors, (27), 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 20:47:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:03,686 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-12-21 20:47:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:03,688 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 20:47:03,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:03,692 INFO L225 Difference]: With dead ends: 43 [2021-12-21 20:47:03,692 INFO L226 Difference]: Without dead ends: 22 [2021-12-21 20:47:03,699 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 20:47:03,703 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 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 20:47:03,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-21 20:47:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-21 20:47:03,732 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 20:47:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-21 20:47:03,734 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2021-12-21 20:47:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:03,735 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-21 20:47:03,735 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 20:47:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-21 20:47:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-21 20:47:03,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:03,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:03,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 20:47:03,737 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash -601798096, now seen corresponding path program 1 times [2021-12-21 20:47:03,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:03,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657377217] [2021-12-21 20:47:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:03,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:03,785 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 20:47:03,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:03,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657377217] [2021-12-21 20:47:03,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657377217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:03,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:03,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 20:47:03,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650073543] [2021-12-21 20:47:03,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:03,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:47:03,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:47:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:03,801 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 20:47:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:03,848 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-12-21 20:47:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:03,849 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 20:47:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:03,851 INFO L225 Difference]: With dead ends: 42 [2021-12-21 20:47:03,851 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 20:47:03,851 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 20:47:03,854 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 20:47:03,855 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 20:47:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 20:47:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-21 20:47:03,864 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 20:47:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-12-21 20:47:03,866 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2021-12-21 20:47:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:03,867 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-12-21 20:47:03,868 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 20:47:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-12-21 20:47:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 20:47:03,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:03,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:03,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 20:47:03,870 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash 758423009, now seen corresponding path program 1 times [2021-12-21 20:47:03,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:03,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900573817] [2021-12-21 20:47:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:03,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:03,938 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 20:47:03,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:03,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900573817] [2021-12-21 20:47:03,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900573817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:03,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268244903] [2021-12-21 20:47:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:03,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:03,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:03,957 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 20:47:03,959 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 20:47:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 20:47:03,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:04,053 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 20:47:04,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:04,137 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 20:47:04,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268244903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:04,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:04,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-21 20:47:04,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433762987] [2021-12-21 20:47:04,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:04,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 20:47:04,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:04,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 20:47:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-21 20:47:04,144 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 20:47:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:04,213 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-12-21 20:47:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:47:04,214 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 20:47:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:04,215 INFO L225 Difference]: With dead ends: 39 [2021-12-21 20:47:04,216 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 20:47:04,216 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 20:47:04,217 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:04,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 72 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 20:47:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-21 20:47:04,226 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 20:47:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-21 20:47:04,226 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 13 [2021-12-21 20:47:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:04,227 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-21 20:47:04,227 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 20:47:04,227 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-21 20:47:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 20:47:04,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:04,227 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:04,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:04,439 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 20:47:04,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:04,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1647452250, now seen corresponding path program 1 times [2021-12-21 20:47:04,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:04,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899179315] [2021-12-21 20:47:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:04,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,464 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 20:47:04,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899179315] [2021-12-21 20:47:04,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899179315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:04,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:04,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 20:47:04,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681705226] [2021-12-21 20:47:04,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:04,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 20:47:04,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 20:47:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 20:47:04,465 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 20:47:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:04,483 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-21 20:47:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:04,483 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 20:47:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:04,484 INFO L225 Difference]: With dead ends: 48 [2021-12-21 20:47:04,484 INFO L226 Difference]: Without dead ends: 47 [2021-12-21 20:47:04,484 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 20:47:04,485 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 20:47:04,485 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 20:47:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-21 20:47:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-12-21 20:47:04,489 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 20:47:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-12-21 20:47:04,490 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 16 [2021-12-21 20:47:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:04,490 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-12-21 20:47:04,490 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 20:47:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-12-21 20:47:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 20:47:04,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:04,490 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:04,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 20:47:04,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1647452195, now seen corresponding path program 1 times [2021-12-21 20:47:04,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:04,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71461857] [2021-12-21 20:47:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:04,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,542 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 20:47:04,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71461857] [2021-12-21 20:47:04,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71461857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:04,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:04,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 20:47:04,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475293935] [2021-12-21 20:47:04,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:04,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 20:47:04,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:04,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 20:47:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 20:47:04,545 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 20:47:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:04,554 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-12-21 20:47:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 20:47:04,554 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 20:47:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:04,555 INFO L225 Difference]: With dead ends: 64 [2021-12-21 20:47:04,555 INFO L226 Difference]: Without dead ends: 42 [2021-12-21 20:47:04,555 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 20:47:04,556 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 20:47:04,556 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 20:47:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-21 20:47:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-21 20:47:04,560 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 20:47:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-12-21 20:47:04,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 16 [2021-12-21 20:47:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:04,561 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-12-21 20:47:04,561 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 20:47:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-12-21 20:47:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 20:47:04,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:04,562 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:04,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 20:47:04,562 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 468587862, now seen corresponding path program 1 times [2021-12-21 20:47:04,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:04,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397410837] [2021-12-21 20:47:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:04,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,580 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 20:47:04,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397410837] [2021-12-21 20:47:04,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397410837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:04,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:04,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:47:04,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599464551] [2021-12-21 20:47:04,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:04,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 20:47:04,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 20:47:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:47:04,582 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 20:47:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:04,587 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-21 20:47:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 20:47:04,587 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 20:47:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:04,588 INFO L225 Difference]: With dead ends: 42 [2021-12-21 20:47:04,588 INFO L226 Difference]: Without dead ends: 37 [2021-12-21 20:47:04,588 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 20:47:04,589 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 20:47:04,589 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 20:47:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-21 20:47:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-21 20:47:04,593 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 20:47:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-12-21 20:47:04,594 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 17 [2021-12-21 20:47:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:04,594 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-12-21 20:47:04,594 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 20:47:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-12-21 20:47:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 20:47:04,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:04,595 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 20:47:04,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 20:47:04,596 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1288772758, now seen corresponding path program 1 times [2021-12-21 20:47:04,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:04,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876147103] [2021-12-21 20:47:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:04,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,675 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 20:47:04,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:04,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876147103] [2021-12-21 20:47:04,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876147103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:04,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616493666] [2021-12-21 20:47:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:04,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:04,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:04,676 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 20:47:04,677 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 20:47:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:04,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 20:47:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:04,774 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 20:47:04,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 20:47:04,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616493666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:04,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 20:47:04,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2021-12-21 20:47:04,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557097337] [2021-12-21 20:47:04,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:04,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 20:47:04,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:04,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 20:47:04,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-21 20:47:04,776 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 20:47:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:04,809 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-12-21 20:47:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 20:47:04,811 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 20:47:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:04,813 INFO L225 Difference]: With dead ends: 37 [2021-12-21 20:47:04,813 INFO L226 Difference]: Without dead ends: 36 [2021-12-21 20:47:04,813 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 20:47:04,814 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 20:47:04,814 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 20:47:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-21 20:47:04,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-12-21 20:47:04,825 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 20:47:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-12-21 20:47:04,827 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 27 [2021-12-21 20:47:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:04,827 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-12-21 20:47:04,827 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 20:47:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-12-21 20:47:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 20:47:04,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:04,828 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 20:47:04,845 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 20:47:05,039 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 20:47:05,040 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1297249887, now seen corresponding path program 1 times [2021-12-21 20:47:05,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:05,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714475514] [2021-12-21 20:47:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:05,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,064 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 20:47:05,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:05,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714475514] [2021-12-21 20:47:05,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714475514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 20:47:05,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 20:47:05,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 20:47:05,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111721679] [2021-12-21 20:47:05,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 20:47:05,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 20:47:05,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:05,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 20:47:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 20:47:05,067 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 20:47:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:05,072 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-12-21 20:47:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 20:47:05,072 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 20:47:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:05,073 INFO L225 Difference]: With dead ends: 36 [2021-12-21 20:47:05,073 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 20:47:05,073 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 20:47:05,074 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 20:47:05,076 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 20:47:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 20:47:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-21 20:47:05,080 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 20:47:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-12-21 20:47:05,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2021-12-21 20:47:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:05,081 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-12-21 20:47:05,081 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 20:47:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-12-21 20:47:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 20:47:05,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:05,083 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 20:47:05,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 20:47:05,083 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1116627082, now seen corresponding path program 1 times [2021-12-21 20:47:05,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:05,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938100927] [2021-12-21 20:47:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:05,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,120 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 20:47:05,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938100927] [2021-12-21 20:47:05,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938100927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:05,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948695876] [2021-12-21 20:47:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:05,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:05,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:05,135 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 20:47:05,136 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 20:47:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 20:47:05,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:05,231 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 20:47:05,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:05,344 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 20:47:05,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948695876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:05,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:05,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2021-12-21 20:47:05,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682310708] [2021-12-21 20:47:05,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:05,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 20:47:05,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 20:47:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-21 20:47:05,346 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 20:47:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:05,510 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2021-12-21 20:47:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 20:47:05,510 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 20:47:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:05,512 INFO L225 Difference]: With dead ends: 122 [2021-12-21 20:47:05,512 INFO L226 Difference]: Without dead ends: 89 [2021-12-21 20:47:05,512 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 20:47:05,513 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:05,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 133 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 20:47:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-21 20:47:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-12-21 20:47:05,529 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 20:47:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2021-12-21 20:47:05,530 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 30 [2021-12-21 20:47:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:05,530 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2021-12-21 20:47:05,530 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 20:47:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2021-12-21 20:47:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 20:47:05,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:05,532 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 20:47:05,548 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 20:47:05,748 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 20:47:05,749 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:05,749 INFO L85 PathProgramCache]: Analyzing trace with hash -244897613, now seen corresponding path program 2 times [2021-12-21 20:47:05,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:05,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494939773] [2021-12-21 20:47:05,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:05,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:05,967 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 20:47:05,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494939773] [2021-12-21 20:47:05,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494939773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124817792] [2021-12-21 20:47:05,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:47:05,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:05,968 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 20:47:05,989 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 20:47:06,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:47:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:06,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 20:47:06,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:06,246 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 20:47:06,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:06,740 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 20:47:06,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124817792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:06,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:06,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 23 [2021-12-21 20:47:06,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928524170] [2021-12-21 20:47:06,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:06,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 20:47:06,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:06,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 20:47:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-12-21 20:47:06,742 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 20:47:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:06,918 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2021-12-21 20:47:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 20:47:06,918 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 20:47:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:06,919 INFO L225 Difference]: With dead ends: 139 [2021-12-21 20:47:06,919 INFO L226 Difference]: Without dead ends: 83 [2021-12-21 20:47:06,920 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 20:47:06,920 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:06,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 280 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-21 20:47:06,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-21 20:47:06,925 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 20:47:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-12-21 20:47:06,926 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 91 [2021-12-21 20:47:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:06,926 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-12-21 20:47:06,926 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 20:47:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-12-21 20:47:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 20:47:06,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:06,927 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:06,953 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 20:47:07,149 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 20:47:07,149 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2079362653, now seen corresponding path program 3 times [2021-12-21 20:47:07,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:07,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511951835] [2021-12-21 20:47:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:07,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:07,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:07,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:07,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:07,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-21 20:47:07,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511951835] [2021-12-21 20:47:07,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511951835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206070449] [2021-12-21 20:47:07,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:47:07,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:07,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:07,327 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 20:47:07,328 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 20:47:07,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 20:47:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 20:47:07,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 80 proven. 12 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-21 20:47:07,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 80 proven. 12 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-21 20:47:07,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206070449] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:07,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:07,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2021-12-21 20:47:07,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403665305] [2021-12-21 20:47:07,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:07,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 20:47:07,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 20:47:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-12-21 20:47:07,792 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 20:47:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:08,206 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2021-12-21 20:47:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-21 20:47:08,207 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 87 [2021-12-21 20:47:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:08,208 INFO L225 Difference]: With dead ends: 148 [2021-12-21 20:47:08,208 INFO L226 Difference]: Without dead ends: 130 [2021-12-21 20:47:08,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 20:47:08,209 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:08,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 165 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-21 20:47:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2021-12-21 20:47:08,217 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 20:47:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2021-12-21 20:47:08,218 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 87 [2021-12-21 20:47:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:08,218 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2021-12-21 20:47:08,218 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 20:47:08,218 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2021-12-21 20:47:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-21 20:47:08,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:08,219 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 20:47:08,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:08,435 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 20:47:08,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1902147306, now seen corresponding path program 4 times [2021-12-21 20:47:08,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:08,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460796653] [2021-12-21 20:47:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:08,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:08,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:08,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:08,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:08,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:08,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:08,692 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 20:47:08,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:08,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460796653] [2021-12-21 20:47:08,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460796653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:08,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71626460] [2021-12-21 20:47:08,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 20:47:08,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:08,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:08,694 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 20:47:08,695 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 20:47:08,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 20:47:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 20:47:08,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:08,969 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 20:47:08,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:10,012 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 20:47:10,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71626460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:10,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:10,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 41 [2021-12-21 20:47:10,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831530144] [2021-12-21 20:47:10,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:10,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-21 20:47:10,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-21 20:47:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 20:47:10,014 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 20:47:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:10,229 INFO L93 Difference]: Finished difference Result 638 states and 722 transitions. [2021-12-21 20:47:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-21 20:47:10,230 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 20:47:10,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:10,232 INFO L225 Difference]: With dead ends: 638 [2021-12-21 20:47:10,232 INFO L226 Difference]: Without dead ends: 469 [2021-12-21 20:47:10,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=625, Invalid=2681, Unknown=0, NotChecked=0, Total=3306 [2021-12-21 20:47:10,235 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 107 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:10,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 258 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 20:47:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-21 20:47:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 230. [2021-12-21 20:47:10,247 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 20:47:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 250 transitions. [2021-12-21 20:47:10,248 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 250 transitions. Word has length 132 [2021-12-21 20:47:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:10,249 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 250 transitions. [2021-12-21 20:47:10,249 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 20:47:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 250 transitions. [2021-12-21 20:47:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-21 20:47:10,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:10,251 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 20:47:10,271 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 20:47:10,471 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 20:47:10,472 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:10,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:10,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1072440394, now seen corresponding path program 5 times [2021-12-21 20:47:10,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:10,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202338027] [2021-12-21 20:47:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:10,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:10,896 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 20:47:10,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:10,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202338027] [2021-12-21 20:47:10,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202338027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:10,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888138943] [2021-12-21 20:47:10,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 20:47:10,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:10,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:10,897 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 20:47:10,899 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 20:47:10,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-21 20:47:10,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:10,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-21 20:47:10,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:11,369 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 20:47:11,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:12,551 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 20:47:12,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888138943] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:12,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:12,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 27 [2021-12-21 20:47:12,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718521771] [2021-12-21 20:47:12,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:12,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 20:47:12,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 20:47:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-12-21 20:47:12,553 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 20:47:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:12,926 INFO L93 Difference]: Finished difference Result 492 states and 542 transitions. [2021-12-21 20:47:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-21 20:47:12,927 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 20:47:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:12,928 INFO L225 Difference]: With dead ends: 492 [2021-12-21 20:47:12,928 INFO L226 Difference]: Without dead ends: 301 [2021-12-21 20:47:12,929 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 20:47:12,929 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:12,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 297 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 20:47:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-21 20:47:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2021-12-21 20:47:12,942 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 20:47:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 309 transitions. [2021-12-21 20:47:12,943 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 309 transitions. Word has length 262 [2021-12-21 20:47:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:12,943 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 309 transitions. [2021-12-21 20:47:12,943 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 20:47:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 309 transitions. [2021-12-21 20:47:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-12-21 20:47:12,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:12,945 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 16, 15, 15, 15, 15, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:12,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-21 20:47:13,163 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 20:47:13,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash -60644733, now seen corresponding path program 6 times [2021-12-21 20:47:13,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:13,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366207150] [2021-12-21 20:47:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:13,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 1945 proven. 90 refuted. 0 times theorem prover too weak. 2531 trivial. 0 not checked. [2021-12-21 20:47:13,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:13,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366207150] [2021-12-21 20:47:13,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366207150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:13,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581472717] [2021-12-21 20:47:13,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 20:47:13,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:13,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:13,578 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 20:47:13,579 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 20:47:13,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-21 20:47:13,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:13,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 20:47:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 1402 proven. 119 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2021-12-21 20:47:14,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 1402 proven. 119 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2021-12-21 20:47:14,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581472717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:14,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:14,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2021-12-21 20:47:14,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852114418] [2021-12-21 20:47:14,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:14,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-21 20:47:14,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-21 20:47:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2021-12-21 20:47:14,901 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 20:47:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:16,718 INFO L93 Difference]: Finished difference Result 1217 states and 1388 transitions. [2021-12-21 20:47:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-21 20:47:16,718 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 293 [2021-12-21 20:47:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:16,721 INFO L225 Difference]: With dead ends: 1217 [2021-12-21 20:47:16,721 INFO L226 Difference]: Without dead ends: 971 [2021-12-21 20:47:16,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2102, Invalid=12178, Unknown=0, NotChecked=0, Total=14280 [2021-12-21 20:47:16,725 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 531 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:16,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 392 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 20:47:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-12-21 20:47:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 380. [2021-12-21 20:47:16,747 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 20:47:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 409 transitions. [2021-12-21 20:47:16,748 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 409 transitions. Word has length 293 [2021-12-21 20:47:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:16,748 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 409 transitions. [2021-12-21 20:47:16,749 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 20:47:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 409 transitions. [2021-12-21 20:47:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-21 20:47:16,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:16,752 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 20:47:16,779 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 20:47:16,963 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 20:47:16,963 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:16,964 INFO L85 PathProgramCache]: Analyzing trace with hash 286972742, now seen corresponding path program 7 times [2021-12-21 20:47:16,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:16,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399346664] [2021-12-21 20:47:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:16,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,479 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 20:47:17,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:17,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399346664] [2021-12-21 20:47:17,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399346664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:17,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902689995] [2021-12-21 20:47:17,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 20:47:17,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:17,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:17,482 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 20:47:17,483 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 20:47:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 20:47:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:18,214 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 20:47:18,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:21,865 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 20:47:21,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902689995] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:21,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:21,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 33] total 44 [2021-12-21 20:47:21,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198596554] [2021-12-21 20:47:21,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:21,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-21 20:47:21,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-21 20:47:21,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 20:47:21,867 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 20:47:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:23,032 INFO L93 Difference]: Finished difference Result 787 states and 849 transitions. [2021-12-21 20:47:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-21 20:47:23,032 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 20:47:23,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:23,034 INFO L225 Difference]: With dead ends: 787 [2021-12-21 20:47:23,034 INFO L226 Difference]: Without dead ends: 521 [2021-12-21 20:47:23,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 653 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1171, Invalid=7759, Unknown=0, NotChecked=0, Total=8930 [2021-12-21 20:47:23,037 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 75 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:23,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 418 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 20:47:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-12-21 20:47:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 469. [2021-12-21 20:47:23,063 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 20:47:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 500 transitions. [2021-12-21 20:47:23,064 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 500 transitions. Word has length 322 [2021-12-21 20:47:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:23,065 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 500 transitions. [2021-12-21 20:47:23,065 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 20:47:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 500 transitions. [2021-12-21 20:47:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-12-21 20:47:23,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:23,067 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 20:47:23,084 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 20:47:23,286 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 20:47:23,286 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:23,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash 113070627, now seen corresponding path program 8 times [2021-12-21 20:47:23,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:23,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030096172] [2021-12-21 20:47:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:23,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:23,937 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 20:47:23,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030096172] [2021-12-21 20:47:23,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030096172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:23,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146510160] [2021-12-21 20:47:23,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 20:47:23,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:23,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:23,939 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 20:47:23,967 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 20:47:24,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 20:47:24,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:24,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 20:47:24,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:24,822 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 20:47:24,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:29,188 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 20:47:29,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146510160] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:29,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:29,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38, 38] total 51 [2021-12-21 20:47:29,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198700150] [2021-12-21 20:47:29,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-21 20:47:29,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-21 20:47:29,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2021-12-21 20:47:29,190 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 20:47:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:30,790 INFO L93 Difference]: Finished difference Result 958 states and 1021 transitions. [2021-12-21 20:47:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-21 20:47:30,790 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 20:47:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:30,792 INFO L225 Difference]: With dead ends: 958 [2021-12-21 20:47:30,792 INFO L226 Difference]: Without dead ends: 668 [2021-12-21 20:47:30,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 680 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3934 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1769, Invalid=12037, Unknown=0, NotChecked=0, Total=13806 [2021-12-21 20:47:30,797 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 85 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:30,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 428 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 20:47:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-21 20:47:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 588. [2021-12-21 20:47:30,833 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 20:47:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 622 transitions. [2021-12-21 20:47:30,835 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 622 transitions. Word has length 337 [2021-12-21 20:47:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:30,836 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 622 transitions. [2021-12-21 20:47:30,836 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 20:47:30,836 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 622 transitions. [2021-12-21 20:47:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-21 20:47:30,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:30,839 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 20:47:30,858 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 20:47:31,055 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 20:47:31,055 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:31,056 INFO L85 PathProgramCache]: Analyzing trace with hash -382247901, now seen corresponding path program 9 times [2021-12-21 20:47:31,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:31,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241095027] [2021-12-21 20:47:31,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:31,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:31,773 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 20:47:31,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:31,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241095027] [2021-12-21 20:47:31,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241095027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:31,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371857201] [2021-12-21 20:47:31,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 20:47:31,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:31,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:31,775 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 20:47:31,816 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 20:47:32,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-21 20:47:32,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:32,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 20:47:32,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:32,730 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 20:47:32,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:33,769 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 20:47:33,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371857201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:33,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:33,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 21, 21] total 73 [2021-12-21 20:47:33,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177880617] [2021-12-21 20:47:33,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:33,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-21 20:47:33,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-21 20:47:33,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=4528, Unknown=0, NotChecked=0, Total=5256 [2021-12-21 20:47:33,772 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 20:47:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:35,789 INFO L93 Difference]: Finished difference Result 1739 states and 1954 transitions. [2021-12-21 20:47:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-21 20:47:35,789 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 20:47:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:35,794 INFO L225 Difference]: With dead ends: 1739 [2021-12-21 20:47:35,794 INFO L226 Difference]: Without dead ends: 1423 [2021-12-21 20:47:35,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4627 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3164, Invalid=16296, Unknown=0, NotChecked=0, Total=19460 [2021-12-21 20:47:35,797 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 477 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:35,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 742 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 20:47:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-12-21 20:47:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 803. [2021-12-21 20:47:35,877 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 20:47:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 851 transitions. [2021-12-21 20:47:35,879 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 851 transitions. Word has length 359 [2021-12-21 20:47:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:35,880 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 851 transitions. [2021-12-21 20:47:35,880 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 20:47:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 851 transitions. [2021-12-21 20:47:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-21 20:47:35,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:35,884 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 20:47:35,915 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 20:47:36,101 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 20:47:36,101 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1921176138, now seen corresponding path program 10 times [2021-12-21 20:47:36,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:36,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584954729] [2021-12-21 20:47:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:36,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 20:47:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:36,837 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 20:47:36,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:36,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584954729] [2021-12-21 20:47:36,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584954729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:36,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044602189] [2021-12-21 20:47:36,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 20:47:36,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:36,838 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 20:47:36,863 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 20:47:37,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 20:47:37,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 20:47:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:37,992 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 20:47:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:43,906 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 20:47:43,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044602189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:43,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:43,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 48, 48] total 65 [2021-12-21 20:47:43,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421939155] [2021-12-21 20:47:43,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:43,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-21 20:47:43,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-21 20:47:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=3770, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 20:47:43,908 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 20:47:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:46,903 INFO L93 Difference]: Finished difference Result 1552 states and 1640 transitions. [2021-12-21 20:47:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-21 20:47:46,903 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 20:47:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:46,907 INFO L225 Difference]: With dead ends: 1552 [2021-12-21 20:47:46,907 INFO L226 Difference]: Without dead ends: 1154 [2021-12-21 20:47:46,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 776 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8655 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3583, Invalid=25147, Unknown=0, NotChecked=0, Total=28730 [2021-12-21 20:47:46,910 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 107 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 3298 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:46,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 574 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3298 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 20:47:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-12-21 20:47:46,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1000. [2021-12-21 20:47:46,991 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 20:47:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1053 transitions. [2021-12-21 20:47:47,015 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1053 transitions. Word has length 388 [2021-12-21 20:47:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:47,015 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 1053 transitions. [2021-12-21 20:47:47,016 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 20:47:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1053 transitions. [2021-12-21 20:47:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-12-21 20:47:47,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:47,019 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 20:47:47,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-21 20:47:47,237 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 20:47:47,238 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:47,238 INFO L85 PathProgramCache]: Analyzing trace with hash 373178470, now seen corresponding path program 11 times [2021-12-21 20:47:47,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:47,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009776951] [2021-12-21 20:47:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:47,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:47,959 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 20:47:47,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:47,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009776951] [2021-12-21 20:47:47,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009776951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:47,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886090844] [2021-12-21 20:47:47,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 20:47:47,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:47,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:47,961 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 20:47:47,964 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 20:47:48,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-21 20:47:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 20:47:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:47:49,219 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 20:47:49,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 20:47:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12040 backedges. 8445 proven. 1429 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2021-12-21 20:47:53,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886090844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 20:47:53,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 20:47:53,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 48, 48] total 69 [2021-12-21 20:47:53,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268145708] [2021-12-21 20:47:53,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 20:47:53,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-21 20:47:53,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 20:47:53,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-21 20:47:53,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=4229, Unknown=0, NotChecked=0, Total=4692 [2021-12-21 20:47:53,442 INFO L87 Difference]: Start difference. First operand 1000 states and 1053 transitions. Second operand has 69 states, 69 states have (on average 2.260869565217391) internal successors, (156), 61 states have internal predecessors, (156), 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 20:47:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 20:47:56,861 INFO L93 Difference]: Finished difference Result 1870 states and 1963 transitions. [2021-12-21 20:47:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-12-21 20:47:56,868 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.260869565217391) internal successors, (156), 61 states have internal predecessors, (156), 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 404 [2021-12-21 20:47:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 20:47:56,871 INFO L225 Difference]: With dead ends: 1870 [2021-12-21 20:47:56,872 INFO L226 Difference]: Without dead ends: 1448 [2021-12-21 20:47:56,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 805 SyntacticMatches, 3 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10402 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4838, Invalid=30694, Unknown=0, NotChecked=0, Total=35532 [2021-12-21 20:47:56,875 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 130 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 3798 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 3823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 20:47:56,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 559 Invalid, 3823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3798 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 20:47:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-12-21 20:47:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1248. [2021-12-21 20:47:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1195 states have (on average 1.0502092050209204) internal successors, (1255), 1195 states have internal predecessors, (1255), 3 states have call successors, (3), 2 states have call predecessors, (3), 49 states have return successors, (50), 50 states have call predecessors, (50), 2 states have call successors, (50) [2021-12-21 20:47:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1308 transitions. [2021-12-21 20:47:56,996 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1308 transitions. Word has length 404 [2021-12-21 20:47:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 20:47:56,996 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1308 transitions. [2021-12-21 20:47:56,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.260869565217391) internal successors, (156), 61 states have internal predecessors, (156), 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 20:47:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1308 transitions. [2021-12-21 20:47:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-12-21 20:47:57,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 20:47:57,000 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 16, 15, 15, 15, 15, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-12-21 20:47:57,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 20:47:57,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:57,218 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-12-21 20:47:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 20:47:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash 144455286, now seen corresponding path program 12 times [2021-12-21 20:47:57,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 20:47:57,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994196653] [2021-12-21 20:47:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 20:47:57,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 20:47:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:57,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 20:47:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:57,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:57,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:57,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:57,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:57,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:57,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:58,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:58,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:58,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:58,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:58,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 20:47:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 20:47:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 9009 proven. 1914 refuted. 0 times theorem prover too weak. 1638 trivial. 0 not checked. [2021-12-21 20:47:58,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 20:47:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994196653] [2021-12-21 20:47:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994196653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 20:47:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146362107] [2021-12-21 20:47:58,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 20:47:58,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 20:47:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 20:47:58,445 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 20:47:58,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 20:47:58,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-21 20:47:58,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 20:47:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-21 20:47:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 20:48:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 580 proven. 10191 refuted. 0 times theorem prover too weak. 1790 trivial. 0 not checked. [2021-12-21 20:48:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates...