./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.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 0837a1e1d82be1b28ccf3514392f1b01c88a9160 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:22:09,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:22:09,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:22:09,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:22:09,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:22:09,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:22:09,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:22:09,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:22:09,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:22:09,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:22:09,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:22:09,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:22:09,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:22:09,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:22:09,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:22:09,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:22:09,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:22:09,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:22:09,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:22:09,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:22:09,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:22:09,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:22:09,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:22:09,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:22:09,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:22:09,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:22:09,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:22:09,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:22:09,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:22:09,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:22:09,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:22:09,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:22:09,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:22:09,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:22:09,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:22:09,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:22:09,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:22:09,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:22:09,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:22:09,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:22:09,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:22:09,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-20 06:22:09,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:22:09,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:22:09,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:22:09,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:22:09,190 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:22:09,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:22:09,190 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:22:09,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:22:09,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:22:09,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 06:22:09,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:22:09,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 06:22:09,192 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-20 06:22:09,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:22:09,192 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:22:09,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 06:22:09,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:22:09,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:22:09,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:22:09,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:22:09,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:22:09,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:22:09,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:22:09,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 06:22:09,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:22:09,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:22:09,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 06:22:09,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:22:09,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2020-10-20 06:22:09,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:22:09,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:22:09,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:22:09,440 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:22:09,440 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:22:09,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2020-10-20 06:22:09,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4ea68b69/d7f0865544424ee6aadde2762457ff12/FLAGf6c6203fa [2020-10-20 06:22:09,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:22:09,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2020-10-20 06:22:09,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4ea68b69/d7f0865544424ee6aadde2762457ff12/FLAGf6c6203fa [2020-10-20 06:22:10,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4ea68b69/d7f0865544424ee6aadde2762457ff12 [2020-10-20 06:22:10,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:22:10,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:22:10,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:22:10,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:22:10,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:22:10,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6898dc9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10, skipping insertion in model container [2020-10-20 06:22:10,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:22:10,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:22:10,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:22:10,577 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:22:10,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:22:10,623 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:22:10,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10 WrapperNode [2020-10-20 06:22:10,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:22:10,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:22:10,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:22:10,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:22:10,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:22:10,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:22:10,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:22:10,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:22:10,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... [2020-10-20 06:22:10,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:22:10,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:22:10,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:22:10,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:22:10,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:22:10,745 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-10-20 06:22:10,745 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-10-20 06:22:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-10-20 06:22:10,746 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-10-20 06:22:10,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:22:10,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:22:10,957 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:22:10,957 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-20 06:22:10,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:22:10 BoogieIcfgContainer [2020-10-20 06:22:10,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:22:10,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:22:10,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:22:10,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:22:10,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:22:10" (1/3) ... [2020-10-20 06:22:10,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409b084b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:22:10, skipping insertion in model container [2020-10-20 06:22:10,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:10" (2/3) ... [2020-10-20 06:22:10,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409b084b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:22:10, skipping insertion in model container [2020-10-20 06:22:10,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:22:10" (3/3) ... [2020-10-20 06:22:10,967 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1d.c [2020-10-20 06:22:10,978 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:22:10,985 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-10-20 06:22:10,999 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-10-20 06:22:11,025 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:22:11,025 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 06:22:11,025 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:22:11,025 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:22:11,026 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:22:11,026 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:22:11,026 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:22:11,026 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:22:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-20 06:22:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 06:22:11,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:11,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:11,054 INFO L429 AbstractCegarLoop]: === Iteration 1 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1656652383, now seen corresponding path program 1 times [2020-10-20 06:22:11,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:11,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605871696] [2020-10-20 06:22:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:22:11,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605871696] [2020-10-20 06:22:11,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:11,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:22:11,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110574516] [2020-10-20 06:22:11,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:22:11,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:11,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:22:11,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:22:11,445 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 7 states. [2020-10-20 06:22:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:11,641 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-10-20 06:22:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:22:11,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-10-20 06:22:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:11,655 INFO L225 Difference]: With dead ends: 86 [2020-10-20 06:22:11,655 INFO L226 Difference]: Without dead ends: 79 [2020-10-20 06:22:11,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:22:11,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-20 06:22:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-10-20 06:22:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-20 06:22:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-10-20 06:22:11,723 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 8 [2020-10-20 06:22:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:11,724 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-10-20 06:22:11,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:22:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-10-20 06:22:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 06:22:11,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:11,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:11,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:22:11,727 INFO L429 AbstractCegarLoop]: === Iteration 2 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash -183383641, now seen corresponding path program 1 times [2020-10-20 06:22:11,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:11,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497305865] [2020-10-20 06:22:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:22:11,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497305865] [2020-10-20 06:22:11,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:11,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:22:11,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008085443] [2020-10-20 06:22:11,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:22:11,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:11,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:22:11,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:22:11,755 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 3 states. [2020-10-20 06:22:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:11,773 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2020-10-20 06:22:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:22:11,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 06:22:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:11,776 INFO L225 Difference]: With dead ends: 70 [2020-10-20 06:22:11,777 INFO L226 Difference]: Without dead ends: 69 [2020-10-20 06:22:11,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:22:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-20 06:22:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-20 06:22:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 06:22:11,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-10-20 06:22:11,794 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 9 [2020-10-20 06:22:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:11,795 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-10-20 06:22:11,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:22:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-10-20 06:22:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 06:22:11,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:11,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:11,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:22:11,797 INFO L429 AbstractCegarLoop]: === Iteration 3 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -138388889, now seen corresponding path program 1 times [2020-10-20 06:22:11,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:11,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166549696] [2020-10-20 06:22:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:11,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:22:11,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166549696] [2020-10-20 06:22:11,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:11,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:22:11,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107063456] [2020-10-20 06:22:11,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:22:11,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:11,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:22:11,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:22:11,835 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 3 states. [2020-10-20 06:22:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:11,849 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-20 06:22:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:22:11,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 06:22:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:11,851 INFO L225 Difference]: With dead ends: 65 [2020-10-20 06:22:11,852 INFO L226 Difference]: Without dead ends: 64 [2020-10-20 06:22:11,852 INFO L677 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 [2020-10-20 06:22:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-20 06:22:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-20 06:22:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 06:22:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-10-20 06:22:11,865 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 11 [2020-10-20 06:22:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:11,865 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-10-20 06:22:11,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:22:11,865 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-10-20 06:22:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 06:22:11,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:11,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:11,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:22:11,873 INFO L429 AbstractCegarLoop]: === Iteration 4 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:11,874 INFO L82 PathProgramCache]: Analyzing trace with hash 4911801, now seen corresponding path program 1 times [2020-10-20 06:22:11,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:11,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532435543] [2020-10-20 06:22:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:11,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:22:11,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532435543] [2020-10-20 06:22:11,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:11,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:22:11,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365603606] [2020-10-20 06:22:11,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:22:11,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:22:11,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:22:11,911 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 4 states. [2020-10-20 06:22:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:11,936 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-10-20 06:22:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:22:11,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 06:22:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:11,938 INFO L225 Difference]: With dead ends: 85 [2020-10-20 06:22:11,939 INFO L226 Difference]: Without dead ends: 84 [2020-10-20 06:22:11,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:22:11,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-20 06:22:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-10-20 06:22:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-20 06:22:11,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2020-10-20 06:22:11,956 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 12 [2020-10-20 06:22:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:11,956 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2020-10-20 06:22:11,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:22:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2020-10-20 06:22:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 06:22:11,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:11,958 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:11,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:22:11,959 INFO L429 AbstractCegarLoop]: === Iteration 5 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:11,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:11,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2115393736, now seen corresponding path program 1 times [2020-10-20 06:22:11,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:11,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244421550] [2020-10-20 06:22:11,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:11,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 06:22:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 06:22:12,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244421550] [2020-10-20 06:22:12,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:22:12,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323207857] [2020-10-20 06:22:12,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:22:12,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:22:12,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:22:12,012 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand 3 states. [2020-10-20 06:22:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,033 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-10-20 06:22:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:22:12,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-20 06:22:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,035 INFO L225 Difference]: With dead ends: 74 [2020-10-20 06:22:12,035 INFO L226 Difference]: Without dead ends: 73 [2020-10-20 06:22:12,035 INFO L677 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 [2020-10-20 06:22:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-20 06:22:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-20 06:22:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-20 06:22:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-20 06:22:12,048 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 16 [2020-10-20 06:22:12,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,048 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-20 06:22:12,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:22:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-20 06:22:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 06:22:12,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,050 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:22:12,050 INFO L429 AbstractCegarLoop]: === Iteration 6 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1152696420, now seen corresponding path program 1 times [2020-10-20 06:22:12,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253308573] [2020-10-20 06:22:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 06:22:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 06:22:12,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253308573] [2020-10-20 06:22:12,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:22:12,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560366182] [2020-10-20 06:22:12,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:22:12,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:22:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:22:12,097 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 4 states. [2020-10-20 06:22:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,121 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2020-10-20 06:22:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:22:12,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-20 06:22:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,124 INFO L225 Difference]: With dead ends: 94 [2020-10-20 06:22:12,124 INFO L226 Difference]: Without dead ends: 93 [2020-10-20 06:22:12,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:22:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-20 06:22:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-10-20 06:22:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-20 06:22:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-10-20 06:22:12,138 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 17 [2020-10-20 06:22:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,139 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-10-20 06:22:12,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:22:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-10-20 06:22:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 06:22:12,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 06:22:12,140 INFO L429 AbstractCegarLoop]: === Iteration 7 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1079409517, now seen corresponding path program 1 times [2020-10-20 06:22:12,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962238793] [2020-10-20 06:22:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:22:12,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962238793] [2020-10-20 06:22:12,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:22:12,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748623799] [2020-10-20 06:22:12,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:22:12,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:22:12,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:22:12,215 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 5 states. [2020-10-20 06:22:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,286 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2020-10-20 06:22:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:22:12,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-20 06:22:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,288 INFO L225 Difference]: With dead ends: 125 [2020-10-20 06:22:12,288 INFO L226 Difference]: Without dead ends: 75 [2020-10-20 06:22:12,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:22:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-20 06:22:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-20 06:22:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-20 06:22:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-10-20 06:22:12,302 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 19 [2020-10-20 06:22:12,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,302 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-10-20 06:22:12,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:22:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-10-20 06:22:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 06:22:12,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,304 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:22:12,307 INFO L429 AbstractCegarLoop]: === Iteration 8 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1643853139, now seen corresponding path program 1 times [2020-10-20 06:22:12,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561660335] [2020-10-20 06:22:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 06:22:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 06:22:12,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561660335] [2020-10-20 06:22:12,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:22:12,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297929330] [2020-10-20 06:22:12,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:22:12,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:22:12,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:22:12,406 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 6 states. [2020-10-20 06:22:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,487 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2020-10-20 06:22:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:22:12,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-20 06:22:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,490 INFO L225 Difference]: With dead ends: 149 [2020-10-20 06:22:12,490 INFO L226 Difference]: Without dead ends: 91 [2020-10-20 06:22:12,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:22:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-20 06:22:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-10-20 06:22:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-20 06:22:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-10-20 06:22:12,505 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 21 [2020-10-20 06:22:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,505 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-10-20 06:22:12,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:22:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-10-20 06:22:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 06:22:12,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,507 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 06:22:12,507 INFO L429 AbstractCegarLoop]: === Iteration 9 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 105489077, now seen corresponding path program 1 times [2020-10-20 06:22:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533253123] [2020-10-20 06:22:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 06:22:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 06:22:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 06:22:12,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533253123] [2020-10-20 06:22:12,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:22:12,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975902341] [2020-10-20 06:22:12,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:22:12,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:22:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:22:12,567 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 6 states. [2020-10-20 06:22:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,640 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2020-10-20 06:22:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:22:12,640 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-20 06:22:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,642 INFO L225 Difference]: With dead ends: 158 [2020-10-20 06:22:12,642 INFO L226 Difference]: Without dead ends: 95 [2020-10-20 06:22:12,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:22:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-20 06:22:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-10-20 06:22:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-20 06:22:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-10-20 06:22:12,656 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 32 [2020-10-20 06:22:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,656 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-10-20 06:22:12,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:22:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-10-20 06:22:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 06:22:12,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,658 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 06:22:12,658 INFO L429 AbstractCegarLoop]: === Iteration 10 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1291302577, now seen corresponding path program 1 times [2020-10-20 06:22:12,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644174318] [2020-10-20 06:22:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 06:22:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 06:22:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-20 06:22:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-20 06:22:12,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644174318] [2020-10-20 06:22:12,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:22:12,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005739324] [2020-10-20 06:22:12,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:22:12,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:22:12,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:22:12,702 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 4 states. [2020-10-20 06:22:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,721 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-10-20 06:22:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:22:12,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-20 06:22:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,724 INFO L225 Difference]: With dead ends: 94 [2020-10-20 06:22:12,724 INFO L226 Difference]: Without dead ends: 93 [2020-10-20 06:22:12,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:22:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-20 06:22:12,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-10-20 06:22:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-20 06:22:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-10-20 06:22:12,736 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 35 [2020-10-20 06:22:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,737 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-10-20 06:22:12,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:22:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-10-20 06:22:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 06:22:12,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,738 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 06:22:12,738 INFO L429 AbstractCegarLoop]: === Iteration 11 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash -552500514, now seen corresponding path program 1 times [2020-10-20 06:22:12,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50571261] [2020-10-20 06:22:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 06:22:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-20 06:22:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-20 06:22:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 06:22:12,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50571261] [2020-10-20 06:22:12,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:22:12,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496524314] [2020-10-20 06:22:12,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:22:12,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:22:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:22:12,773 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 3 states. [2020-10-20 06:22:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,791 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-20 06:22:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:22:12,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-20 06:22:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,793 INFO L225 Difference]: With dead ends: 91 [2020-10-20 06:22:12,793 INFO L226 Difference]: Without dead ends: 90 [2020-10-20 06:22:12,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:22:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-20 06:22:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-20 06:22:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-20 06:22:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2020-10-20 06:22:12,812 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 31 [2020-10-20 06:22:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,813 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2020-10-20 06:22:12,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:22:12,813 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2020-10-20 06:22:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-20 06:22:12,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,814 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 06:22:12,815 INFO L429 AbstractCegarLoop]: === Iteration 12 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash 930510463, now seen corresponding path program 1 times [2020-10-20 06:22:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146165866] [2020-10-20 06:22:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-20 06:22:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 06:22:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-20 06:22:12,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146165866] [2020-10-20 06:22:12,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:22:12,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376397706] [2020-10-20 06:22:12,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:22:12,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:22:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:22:12,916 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand 6 states. [2020-10-20 06:22:12,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,944 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-20 06:22:12,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:22:12,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-20 06:22:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,946 INFO L225 Difference]: With dead ends: 90 [2020-10-20 06:22:12,947 INFO L226 Difference]: Without dead ends: 89 [2020-10-20 06:22:12,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:22:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-20 06:22:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-20 06:22:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-20 06:22:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-10-20 06:22:12,956 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 36 [2020-10-20 06:22:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,956 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-10-20 06:22:12,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:22:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-10-20 06:22:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-20 06:22:12,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,958 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 06:22:12,959 INFO L429 AbstractCegarLoop]: === Iteration 13 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1111626321, now seen corresponding path program 1 times [2020-10-20 06:22:12,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045134865] [2020-10-20 06:22:12,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 06:22:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-20 06:22:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 06:22:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-20 06:22:13,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045134865] [2020-10-20 06:22:13,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:13,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:22:13,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082729793] [2020-10-20 06:22:13,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:22:13,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:13,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:22:13,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:22:13,044 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2020-10-20 06:22:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:13,091 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2020-10-20 06:22:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:22:13,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-20 06:22:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:13,093 INFO L225 Difference]: With dead ends: 99 [2020-10-20 06:22:13,093 INFO L226 Difference]: Without dead ends: 98 [2020-10-20 06:22:13,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:22:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-20 06:22:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-10-20 06:22:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-20 06:22:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2020-10-20 06:22:13,101 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 46 [2020-10-20 06:22:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:13,102 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-10-20 06:22:13,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:22:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2020-10-20 06:22:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-20 06:22:13,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:13,103 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:13,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 06:22:13,104 INFO L429 AbstractCegarLoop]: === Iteration 14 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:13,104 INFO L82 PathProgramCache]: Analyzing trace with hash 138300185, now seen corresponding path program 1 times [2020-10-20 06:22:13,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:13,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13638850] [2020-10-20 06:22:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 06:22:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-20 06:22:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 06:22:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-20 06:22:13,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13638850] [2020-10-20 06:22:13,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739454189] [2020-10-20 06:22:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:22:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:22:13,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:22:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-20 06:22:13,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:22:13,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2020-10-20 06:22:13,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071035294] [2020-10-20 06:22:13,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:22:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:13,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:22:13,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-20 06:22:13,351 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 7 states. [2020-10-20 06:22:13,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:13,554 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-10-20 06:22:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 06:22:13,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-20 06:22:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:13,557 INFO L225 Difference]: With dead ends: 116 [2020-10-20 06:22:13,557 INFO L226 Difference]: Without dead ends: 115 [2020-10-20 06:22:13,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-20 06:22:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-20 06:22:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-20 06:22:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-20 06:22:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2020-10-20 06:22:13,581 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 45 [2020-10-20 06:22:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:13,582 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2020-10-20 06:22:13,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:22:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2020-10-20 06:22:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-20 06:22:13,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:13,586 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:13,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-20 06:22:13,801 INFO L429 AbstractCegarLoop]: === Iteration 15 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1156205799, now seen corresponding path program 1 times [2020-10-20 06:22:13,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:13,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014029288] [2020-10-20 06:22:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-20 06:22:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 06:22:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-20 06:22:13,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014029288] [2020-10-20 06:22:13,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940660473] [2020-10-20 06:22:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-10-20 06:22:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:22:13,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 06:22:13,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:22:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-20 06:22:13,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:22:13,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-20 06:22:13,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033486520] [2020-10-20 06:22:13,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 06:22:13,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:13,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 06:22:13,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:22:13,974 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand 8 states. [2020-10-20 06:22:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:14,059 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2020-10-20 06:22:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:22:14,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-20 06:22:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:14,061 INFO L225 Difference]: With dead ends: 224 [2020-10-20 06:22:14,062 INFO L226 Difference]: Without dead ends: 145 [2020-10-20 06:22:14,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:22:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-20 06:22:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-10-20 06:22:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-20 06:22:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2020-10-20 06:22:14,078 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 43 [2020-10-20 06:22:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:14,079 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2020-10-20 06:22:14,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 06:22:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2020-10-20 06:22:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-20 06:22:14,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:14,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:14,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 06:22:14,298 INFO L429 AbstractCegarLoop]: === Iteration 16 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1154921966, now seen corresponding path program 1 times [2020-10-20 06:22:14,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:14,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384908582] [2020-10-20 06:22:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-20 06:22:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 06:22:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-20 06:22:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-20 06:22:14,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384908582] [2020-10-20 06:22:14,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:14,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:22:14,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236345189] [2020-10-20 06:22:14,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:22:14,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:14,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:22:14,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:22:14,347 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand 3 states. [2020-10-20 06:22:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:14,361 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-20 06:22:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:22:14,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-10-20 06:22:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:14,363 INFO L225 Difference]: With dead ends: 132 [2020-10-20 06:22:14,363 INFO L226 Difference]: Without dead ends: 131 [2020-10-20 06:22:14,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:22:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-20 06:22:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-20 06:22:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-20 06:22:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2020-10-20 06:22:14,378 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 43 [2020-10-20 06:22:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:14,382 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2020-10-20 06:22:14,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:22:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2020-10-20 06:22:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-20 06:22:14,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:14,383 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:14,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-20 06:22:14,384 INFO L429 AbstractCegarLoop]: === Iteration 17 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:14,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:14,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1442842648, now seen corresponding path program 1 times [2020-10-20 06:22:14,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:14,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464199675] [2020-10-20 06:22:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-20 06:22:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 06:22:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-20 06:22:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-20 06:22:14,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464199675] [2020-10-20 06:22:14,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:14,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:22:14,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798463157] [2020-10-20 06:22:14,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:22:14,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:14,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:22:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:22:14,452 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand 4 states. [2020-10-20 06:22:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:14,478 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2020-10-20 06:22:14,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:22:14,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-20 06:22:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:14,480 INFO L225 Difference]: With dead ends: 140 [2020-10-20 06:22:14,480 INFO L226 Difference]: Without dead ends: 132 [2020-10-20 06:22:14,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:22:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-20 06:22:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-20 06:22:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-20 06:22:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 161 transitions. [2020-10-20 06:22:14,497 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 161 transitions. Word has length 44 [2020-10-20 06:22:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:14,498 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 161 transitions. [2020-10-20 06:22:14,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:22:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 161 transitions. [2020-10-20 06:22:14,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-20 06:22:14,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:14,500 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 06:22:14,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-20 06:22:14,501 INFO L429 AbstractCegarLoop]: === Iteration 18 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:14,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1995865818, now seen corresponding path program 2 times [2020-10-20 06:22:14,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:14,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517876270] [2020-10-20 06:22:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 06:22:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-20 06:22:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 06:22:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-20 06:22:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 06:22:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-20 06:22:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 06:22:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-20 06:22:14,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517876270] [2020-10-20 06:22:14,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210205281] [2020-10-20 06:22:14,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:22:14,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 06:22:14,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:22:14,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 06:22:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:22:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-20 06:22:14,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:22:14,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 06:22:14,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943015866] [2020-10-20 06:22:14,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 06:22:14,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:14,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 06:22:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:22:14,814 INFO L87 Difference]: Start difference. First operand 132 states and 161 transitions. Second operand 9 states. [2020-10-20 06:22:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:14,915 INFO L93 Difference]: Finished difference Result 173 states and 211 transitions. [2020-10-20 06:22:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 06:22:14,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-20 06:22:14,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:14,916 INFO L225 Difference]: With dead ends: 173 [2020-10-20 06:22:14,916 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:22:14,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-20 06:22:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:22:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:22:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:22:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:22:14,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2020-10-20 06:22:14,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:14,919 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:22:14,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 06:22:14,919 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:22:14,919 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:22:15,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-20 06:22:15,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 06:22:15,513 INFO L274 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,513 INFO L274 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2020-10-20 06:22:15,513 INFO L274 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,513 INFO L274 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2020-10-20 06:22:15,514 INFO L274 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,514 INFO L277 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2020-10-20 06:22:15,514 INFO L274 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,514 INFO L274 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-10-20 06:22:15,514 INFO L270 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: (or (not (<= |rec1_#in~i| 2147483647)) (and (= |rec1_#in~i| rec1_~i) (<= 1 rec1_~i))) [2020-10-20 06:22:15,514 INFO L274 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,514 INFO L274 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,514 INFO L274 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,515 INFO L274 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,515 INFO L270 CegarLoopResult]: At program point L14-6(line 14) the Hoare annotation is: (or (and (= |rec1_#in~i| rec1_~i) (<= 1 |rec1_#in~i|) (<= |rec1_#t~ret0| 1)) (not (<= |rec1_#in~i| 2147483647))) [2020-10-20 06:22:15,515 INFO L274 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,515 INFO L274 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,515 INFO L274 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,515 INFO L274 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,515 INFO L270 CegarLoopResult]: At program point L14-8(line 14) the Hoare annotation is: (let ((.cse0 (not (<= |rec1_#in~i| 2147483647)))) (and (or .cse0 (and (= |rec1_#in~i| rec1_~i) (<= 1 rec1_~i) (<= |rec1_#t~ret1| 0))) (or .cse0 (<= |rec1_#t~ret0| 1)))) [2020-10-20 06:22:15,516 INFO L274 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,516 INFO L274 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,516 INFO L274 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2020-10-20 06:22:15,517 INFO L274 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,517 INFO L274 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2020-10-20 06:22:15,517 INFO L274 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2020-10-20 06:22:15,517 INFO L270 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (or (not (<= |rec2_#in~j| 2147483647)) (and (<= rec2_~j 2147483647) (<= 1 rec2_~j))) (not (<= |rec2_#in~j| 0))) [2020-10-20 06:22:15,517 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,517 INFO L274 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-10-20 06:22:15,518 INFO L274 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,518 INFO L274 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,518 INFO L270 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (or (not (<= |rec2_#in~j| 2147483647)) (and (<= |rec2_#t~ret3| 1) (<= rec2_~j 2147483647) (<= 1 rec2_~j) (<= 1 |rec2_#t~ret3|))) (not (<= |rec2_#in~j| 0))) [2020-10-20 06:22:15,518 INFO L274 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,518 INFO L274 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,519 INFO L274 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,519 INFO L277 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2020-10-20 06:22:15,519 INFO L274 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,519 INFO L274 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,519 INFO L274 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-10-20 06:22:15,520 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 06:22:15,520 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 06:22:15,520 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 06:22:15,520 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-10-20 06:22:15,520 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-20 06:22:15,520 INFO L274 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-10-20 06:22:15,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:22:15 BoogieIcfgContainer [2020-10-20 06:22:15,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:22:15,527 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:22:15,527 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:22:15,527 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:22:15,528 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:22:10" (3/4) ... [2020-10-20 06:22:15,531 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:22:15,538 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2020-10-20 06:22:15,539 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2020-10-20 06:22:15,544 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-20 06:22:15,544 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 06:22:15,593 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:22:15,593 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:22:15,596 INFO L168 Benchmark]: Toolchain (without parser) took 5274.37 ms. Allocated memory was 39.8 MB in the beginning and 61.3 MB in the end (delta: 21.5 MB). Free memory was 18.9 MB in the beginning and 23.9 MB in the end (delta: -4.9 MB). Peak memory consumption was 16.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:15,596 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 30.9 MB. Free memory was 6.5 MB in the beginning and 6.5 MB in the end (delta: 41.6 kB). Peak memory consumption was 41.6 kB. Max. memory is 14.3 GB. [2020-10-20 06:22:15,597 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.49 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 18.1 MB in the beginning and 19.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:15,598 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.88 ms. Allocated memory is still 40.9 MB. Free memory was 19.8 MB in the beginning and 18.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:15,598 INFO L168 Benchmark]: Boogie Preprocessor took 29.11 ms. Allocated memory is still 40.9 MB. Free memory was 18.3 MB in the beginning and 17.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:15,599 INFO L168 Benchmark]: RCFGBuilder took 269.20 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 17.1 MB in the beginning and 17.9 MB in the end (delta: -809.8 kB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:15,599 INFO L168 Benchmark]: TraceAbstraction took 4566.09 ms. Allocated memory was 41.9 MB in the beginning and 61.3 MB in the end (delta: 19.4 MB). Free memory was 17.3 MB in the beginning and 27.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 27.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:15,600 INFO L168 Benchmark]: Witness Printer took 66.42 ms. Allocated memory is still 61.3 MB. Free memory was 27.3 MB in the beginning and 23.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:15,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 30.9 MB. Free memory was 6.5 MB in the beginning and 6.5 MB in the end (delta: 41.6 kB). Peak memory consumption was 41.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 297.49 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 18.1 MB in the beginning and 19.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 35.88 ms. Allocated memory is still 40.9 MB. Free memory was 19.8 MB in the beginning and 18.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 29.11 ms. Allocated memory is still 40.9 MB. Free memory was 18.3 MB in the beginning and 17.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 269.20 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 17.1 MB in the beginning and 17.9 MB in the end (delta: -809.8 kB). Peak memory consumption was 6.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4566.09 ms. Allocated memory was 41.9 MB in the beginning and 61.3 MB in the end (delta: 19.4 MB). Free memory was 17.3 MB in the beginning and 27.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 27.5 MB. Max. memory is 14.3 GB. * Witness Printer took 66.42 ms. Allocated memory is still 61.3 MB. Free memory was 27.3 MB in the beginning and 23.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 18, TraceHistogramMax: 10, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 688 SDtfs, 231 SDslu, 1656 SDs, 0 SdLazy, 529 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 354 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 89 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 241 PreInvPairs, 259 NumberOfFragments, 96 HoareAnnotationTreeSize, 241 FomulaSimplifications, 973 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 313 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 706 NumberOfCodeBlocks, 706 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 685 ConstructedInterpolants, 0 QuantifiedInterpolants, 45897 SizeOfPredicates, 4 NumberOfNonLiveVariables, 342 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 21 InterpolantComputations, 16 PerfectInterpolantSequences, 690/752 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...