./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 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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 0.1.25-906a4fb [2020-10-19 18:29:18,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:29:18,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:29:18,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:29:18,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:29:18,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:29:18,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:29:18,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:29:18,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:29:18,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:29:18,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:29:18,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:29:18,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:29:18,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:29:18,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:29:18,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:29:18,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:29:18,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:29:18,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:29:18,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:29:18,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:29:18,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:29:18,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:29:18,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:29:18,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:29:18,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:29:18,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:29:18,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:29:18,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:29:18,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:29:18,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:29:18,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:29:18,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:29:18,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:29:18,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:29:18,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:29:18,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:29:18,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:29:18,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:29:18,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:29:18,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:29:18,344 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-19 18:29:18,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:29:18,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:29:18,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:29:18,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:29:18,390 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:29:18,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:29:18,390 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:29:18,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:29:18,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:29:18,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 18:29:18,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:29:18,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 18:29:18,393 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-19 18:29:18,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:29:18,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:29:18,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 18:29:18,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:29:18,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:29:18,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:29:18,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:29:18,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:29:18,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:29:18,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:29:18,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 18:29:18,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:29:18,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:29:18,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 18:29:18,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:29:18,397 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 [2020-10-19 18:29:18,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:29:18,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:29:18,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:29:18,753 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:29:18,754 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:29:18,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2020-10-19 18:29:18,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2ed4ea36/de5b4e17da914964847da6461eff54f2/FLAG7613fbdec [2020-10-19 18:29:19,269 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:29:19,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2020-10-19 18:29:19,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2ed4ea36/de5b4e17da914964847da6461eff54f2/FLAG7613fbdec [2020-10-19 18:29:19,679 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2ed4ea36/de5b4e17da914964847da6461eff54f2 [2020-10-19 18:29:19,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:29:19,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:29:19,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:29:19,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:29:19,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:29:19,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:19,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0be566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19, skipping insertion in model container [2020-10-19 18:29:19,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:19,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:29:19,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:29:19,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:29:19,929 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:29:19,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:29:19,956 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:29:19,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19 WrapperNode [2020-10-19 18:29:19,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:29:19,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:29:19,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:29:19,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:29:19,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:19,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:20,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:29:20,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:29:20,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:29:20,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:29:20,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:20,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:20,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:20,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:20,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:20,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:20,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (1/1) ... [2020-10-19 18:29:20,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:29:20,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:29:20,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:29:20,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:29:20,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (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 [2020-10-19 18:29:20,128 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-10-19 18:29:20,129 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-10-19 18:29:20,129 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-10-19 18:29:20,129 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-10-19 18:29:20,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:29:20,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:29:20,332 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:29:20,333 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-19 18:29:20,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:29:20 BoogieIcfgContainer [2020-10-19 18:29:20,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:29:20,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:29:20,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:29:20,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:29:20,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:29:19" (1/3) ... [2020-10-19 18:29:20,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c82a2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:29:20, skipping insertion in model container [2020-10-19 18:29:20,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:29:19" (2/3) ... [2020-10-19 18:29:20,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c82a2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:29:20, skipping insertion in model container [2020-10-19 18:29:20,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:29:20" (3/3) ... [2020-10-19 18:29:20,345 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1d.c [2020-10-19 18:29:20,357 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:29:20,364 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-10-19 18:29:20,382 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-10-19 18:29:20,417 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:29:20,418 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 18:29:20,418 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:29:20,419 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:29:20,419 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:29:20,419 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:29:20,419 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:29:20,420 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:29:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-19 18:29:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:29:20,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:20,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:29:20,452 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]=== [2020-10-19 18:29:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:20,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1656652383, now seen corresponding path program 1 times [2020-10-19 18:29:20,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:20,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819139969] [2020-10-19 18:29:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:20,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:29:20,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819139969] [2020-10-19 18:29:20,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:20,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:29:20,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056729509] [2020-10-19 18:29:20,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:29:20,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:20,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:29:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:29:20,692 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 7 states. [2020-10-19 18:29:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:20,897 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-10-19 18:29:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:29:20,899 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-10-19 18:29:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:20,911 INFO L225 Difference]: With dead ends: 86 [2020-10-19 18:29:20,911 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 18:29:20,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:29:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 18:29:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-10-19 18:29:20,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-19 18:29:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-10-19 18:29:20,973 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 8 [2020-10-19 18:29:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:20,973 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-10-19 18:29:20,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:29:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-10-19 18:29:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:29:20,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:20,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:29:20,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:29:20,977 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]=== [2020-10-19 18:29:20,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:20,978 INFO L82 PathProgramCache]: Analyzing trace with hash -183383641, now seen corresponding path program 1 times [2020-10-19 18:29:20,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:20,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989697456] [2020-10-19 18:29:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:29:21,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989697456] [2020-10-19 18:29:21,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:29:21,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877394479] [2020-10-19 18:29:21,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:29:21,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:29:21,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:29:21,005 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 3 states. [2020-10-19 18:29:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:21,025 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2020-10-19 18:29:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:29:21,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:29:21,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:21,027 INFO L225 Difference]: With dead ends: 70 [2020-10-19 18:29:21,027 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 18:29:21,029 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 [2020-10-19 18:29:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 18:29:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-19 18:29:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-19 18:29:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-10-19 18:29:21,044 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 9 [2020-10-19 18:29:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:21,045 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-10-19 18:29:21,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:29:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-10-19 18:29:21,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:29:21,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:21,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:29:21,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:29:21,047 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]=== [2020-10-19 18:29:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:21,047 INFO L82 PathProgramCache]: Analyzing trace with hash -138388889, now seen corresponding path program 1 times [2020-10-19 18:29:21,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:21,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501336120] [2020-10-19 18:29:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:29:21,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501336120] [2020-10-19 18:29:21,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:29:21,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658096191] [2020-10-19 18:29:21,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:29:21,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:21,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:29:21,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:29:21,079 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 3 states. [2020-10-19 18:29:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:21,097 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-19 18:29:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:29:21,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-19 18:29:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:21,100 INFO L225 Difference]: With dead ends: 65 [2020-10-19 18:29:21,100 INFO L226 Difference]: Without dead ends: 64 [2020-10-19 18:29:21,101 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 [2020-10-19 18:29:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-19 18:29:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-19 18:29:21,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-19 18:29:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-10-19 18:29:21,124 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 11 [2020-10-19 18:29:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:21,125 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-10-19 18:29:21,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:29:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-10-19 18:29:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:29:21,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:21,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:29:21,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:29:21,129 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]=== [2020-10-19 18:29:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash 4911801, now seen corresponding path program 1 times [2020-10-19 18:29:21,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:21,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576728303] [2020-10-19 18:29:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:29:21,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576728303] [2020-10-19 18:29:21,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:29:21,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132328332] [2020-10-19 18:29:21,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:29:21,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:21,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:29:21,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:29:21,170 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 4 states. [2020-10-19 18:29:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:21,197 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-10-19 18:29:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:29:21,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-19 18:29:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:21,200 INFO L225 Difference]: With dead ends: 85 [2020-10-19 18:29:21,200 INFO L226 Difference]: Without dead ends: 84 [2020-10-19 18:29:21,200 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 [2020-10-19 18:29:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-19 18:29:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-10-19 18:29:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-19 18:29:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2020-10-19 18:29:21,215 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 12 [2020-10-19 18:29:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:21,216 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2020-10-19 18:29:21,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:29:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2020-10-19 18:29:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:29:21,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:21,217 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:29:21,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:29:21,218 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]=== [2020-10-19 18:29:21,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:21,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2115393736, now seen corresponding path program 1 times [2020-10-19 18:29:21,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:21,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420689850] [2020-10-19 18:29:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 18:29:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:29:21,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420689850] [2020-10-19 18:29:21,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:29:21,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914982714] [2020-10-19 18:29:21,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:29:21,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:29:21,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:29:21,248 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand 3 states. [2020-10-19 18:29:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:21,262 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-10-19 18:29:21,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:29:21,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-19 18:29:21,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:21,264 INFO L225 Difference]: With dead ends: 74 [2020-10-19 18:29:21,264 INFO L226 Difference]: Without dead ends: 73 [2020-10-19 18:29:21,265 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 [2020-10-19 18:29:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-19 18:29:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-19 18:29:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-19 18:29:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-10-19 18:29:21,278 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 16 [2020-10-19 18:29:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:21,278 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-10-19 18:29:21,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:29:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-10-19 18:29:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:29:21,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:21,280 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:29:21,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:29:21,280 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]=== [2020-10-19 18:29:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1152696420, now seen corresponding path program 1 times [2020-10-19 18:29:21,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:21,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437116381] [2020-10-19 18:29:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 18:29:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:29:21,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437116381] [2020-10-19 18:29:21,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:29:21,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960978996] [2020-10-19 18:29:21,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:29:21,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:21,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:29:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:29:21,324 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 4 states. [2020-10-19 18:29:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:21,349 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2020-10-19 18:29:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:29:21,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-19 18:29:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:21,351 INFO L225 Difference]: With dead ends: 94 [2020-10-19 18:29:21,351 INFO L226 Difference]: Without dead ends: 93 [2020-10-19 18:29:21,352 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 [2020-10-19 18:29:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-19 18:29:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-10-19 18:29:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-19 18:29:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-10-19 18:29:21,368 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 17 [2020-10-19 18:29:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:21,368 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-10-19 18:29:21,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:29:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-10-19 18:29:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:29:21,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:21,370 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:29:21,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:29:21,370 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]=== [2020-10-19 18:29:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1079409517, now seen corresponding path program 1 times [2020-10-19 18:29:21,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:21,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663270270] [2020-10-19 18:29:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:29:21,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663270270] [2020-10-19 18:29:21,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:29:21,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239255813] [2020-10-19 18:29:21,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:29:21,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:21,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:29:21,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:29:21,428 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 5 states. [2020-10-19 18:29:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:21,492 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2020-10-19 18:29:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:29:21,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-19 18:29:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:21,494 INFO L225 Difference]: With dead ends: 125 [2020-10-19 18:29:21,494 INFO L226 Difference]: Without dead ends: 75 [2020-10-19 18:29:21,496 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 [2020-10-19 18:29:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-19 18:29:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-19 18:29:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-19 18:29:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-10-19 18:29:21,509 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 19 [2020-10-19 18:29:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:21,509 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-10-19 18:29:21,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:29:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-10-19 18:29:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:29:21,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:21,514 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:29:21,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:29:21,515 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]=== [2020-10-19 18:29:21,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1643853139, now seen corresponding path program 1 times [2020-10-19 18:29:21,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:21,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522726939] [2020-10-19 18:29:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 18:29:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 18:29:21,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522726939] [2020-10-19 18:29:21,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:29:21,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456829075] [2020-10-19 18:29:21,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:29:21,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:21,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:29:21,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:29:21,627 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 6 states. [2020-10-19 18:29:21,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:21,717 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2020-10-19 18:29:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:29:21,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-19 18:29:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:21,719 INFO L225 Difference]: With dead ends: 149 [2020-10-19 18:29:21,720 INFO L226 Difference]: Without dead ends: 91 [2020-10-19 18:29:21,723 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 [2020-10-19 18:29:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-19 18:29:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-10-19 18:29:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-19 18:29:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-10-19 18:29:21,744 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 21 [2020-10-19 18:29:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:21,745 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-10-19 18:29:21,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:29:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-10-19 18:29:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-19 18:29:21,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:21,751 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] [2020-10-19 18:29:21,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:29:21,752 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]=== [2020-10-19 18:29:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 105489077, now seen corresponding path program 1 times [2020-10-19 18:29:21,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:21,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111376783] [2020-10-19 18:29:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 18:29:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-19 18:29:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 18:29:21,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111376783] [2020-10-19 18:29:21,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:29:21,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322998659] [2020-10-19 18:29:21,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:29:21,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:21,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:29:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:29:21,867 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 6 states. [2020-10-19 18:29:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:21,935 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2020-10-19 18:29:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:29:21,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-19 18:29:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:21,937 INFO L225 Difference]: With dead ends: 158 [2020-10-19 18:29:21,937 INFO L226 Difference]: Without dead ends: 95 [2020-10-19 18:29:21,939 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 [2020-10-19 18:29:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-19 18:29:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-10-19 18:29:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-19 18:29:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-10-19 18:29:21,953 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 32 [2020-10-19 18:29:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:21,954 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-10-19 18:29:21,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:29:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-10-19 18:29:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-19 18:29:21,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:21,956 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] [2020-10-19 18:29:21,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:29:21,956 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]=== [2020-10-19 18:29:21,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:21,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1291302577, now seen corresponding path program 1 times [2020-10-19 18:29:21,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:21,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006456064] [2020-10-19 18:29:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 18:29:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-19 18:29:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-19 18:29:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-19 18:29:21,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006456064] [2020-10-19 18:29:21,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:21,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:29:21,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231559366] [2020-10-19 18:29:21,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:29:21,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:29:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:29:22,000 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 4 states. [2020-10-19 18:29:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:22,022 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-10-19 18:29:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:29:22,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-19 18:29:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:22,025 INFO L225 Difference]: With dead ends: 94 [2020-10-19 18:29:22,025 INFO L226 Difference]: Without dead ends: 93 [2020-10-19 18:29:22,026 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 [2020-10-19 18:29:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-19 18:29:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-10-19 18:29:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-19 18:29:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-10-19 18:29:22,038 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 35 [2020-10-19 18:29:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:22,039 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-10-19 18:29:22,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:29:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-10-19 18:29:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:29:22,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:22,041 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] [2020-10-19 18:29:22,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:29:22,042 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]=== [2020-10-19 18:29:22,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:22,042 INFO L82 PathProgramCache]: Analyzing trace with hash -552500514, now seen corresponding path program 1 times [2020-10-19 18:29:22,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:22,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179937754] [2020-10-19 18:29:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 18:29:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-19 18:29:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 18:29:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-19 18:29:22,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179937754] [2020-10-19 18:29:22,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:22,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:29:22,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713310493] [2020-10-19 18:29:22,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:29:22,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:29:22,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:29:22,076 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 3 states. [2020-10-19 18:29:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:22,087 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-19 18:29:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:29:22,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-19 18:29:22,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:22,090 INFO L225 Difference]: With dead ends: 91 [2020-10-19 18:29:22,090 INFO L226 Difference]: Without dead ends: 90 [2020-10-19 18:29:22,090 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 [2020-10-19 18:29:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-19 18:29:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-19 18:29:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-19 18:29:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2020-10-19 18:29:22,101 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 31 [2020-10-19 18:29:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:22,102 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2020-10-19 18:29:22,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:29:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2020-10-19 18:29:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-19 18:29:22,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:22,104 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] [2020-10-19 18:29:22,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:29:22,105 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]=== [2020-10-19 18:29:22,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:22,105 INFO L82 PathProgramCache]: Analyzing trace with hash 930510463, now seen corresponding path program 1 times [2020-10-19 18:29:22,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:22,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380684505] [2020-10-19 18:29:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 18:29:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:29:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-19 18:29:22,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380684505] [2020-10-19 18:29:22,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:22,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:29:22,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49082274] [2020-10-19 18:29:22,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:29:22,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:22,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:29:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:29:22,178 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand 6 states. [2020-10-19 18:29:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:22,211 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-19 18:29:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:29:22,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-19 18:29:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:22,214 INFO L225 Difference]: With dead ends: 90 [2020-10-19 18:29:22,214 INFO L226 Difference]: Without dead ends: 89 [2020-10-19 18:29:22,214 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 [2020-10-19 18:29:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-19 18:29:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-19 18:29:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-19 18:29:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-10-19 18:29:22,224 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 36 [2020-10-19 18:29:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:22,225 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-10-19 18:29:22,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:29:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-10-19 18:29:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-19 18:29:22,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:22,227 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] [2020-10-19 18:29:22,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:29:22,228 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]=== [2020-10-19 18:29:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1111626321, now seen corresponding path program 1 times [2020-10-19 18:29:22,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:22,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713298832] [2020-10-19 18:29:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 18:29:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 18:29:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:29:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-19 18:29:22,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713298832] [2020-10-19 18:29:22,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:22,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:29:22,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580416688] [2020-10-19 18:29:22,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:29:22,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:22,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:29:22,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:29:22,308 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2020-10-19 18:29:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:22,360 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2020-10-19 18:29:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:29:22,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-19 18:29:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:22,362 INFO L225 Difference]: With dead ends: 99 [2020-10-19 18:29:22,362 INFO L226 Difference]: Without dead ends: 98 [2020-10-19 18:29:22,363 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 [2020-10-19 18:29:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-19 18:29:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-10-19 18:29:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-19 18:29:22,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2020-10-19 18:29:22,372 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 46 [2020-10-19 18:29:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:22,373 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-10-19 18:29:22,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:29:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2020-10-19 18:29:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-19 18:29:22,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:22,375 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] [2020-10-19 18:29:22,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:29:22,376 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]=== [2020-10-19 18:29:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:22,376 INFO L82 PathProgramCache]: Analyzing trace with hash 138300185, now seen corresponding path program 1 times [2020-10-19 18:29:22,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:22,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424506944] [2020-10-19 18:29:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 18:29:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 18:29:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:29:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-19 18:29:22,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424506944] [2020-10-19 18:29:22,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551134365] [2020-10-19 18:29:22,462 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 [2020-10-19 18:29:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:22,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:29:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:29:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-19 18:29:22,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:29:22,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2020-10-19 18:29:22,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243721788] [2020-10-19 18:29:22,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:29:22,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:29:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:29:22,636 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 7 states. [2020-10-19 18:29:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:22,809 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-10-19 18:29:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:29:22,810 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-19 18:29:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:22,812 INFO L225 Difference]: With dead ends: 116 [2020-10-19 18:29:22,812 INFO L226 Difference]: Without dead ends: 115 [2020-10-19 18:29:22,812 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 [2020-10-19 18:29:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-19 18:29:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-10-19 18:29:22,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-19 18:29:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2020-10-19 18:29:22,823 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 45 [2020-10-19 18:29:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:22,824 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2020-10-19 18:29:22,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:29:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2020-10-19 18:29:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-19 18:29:22,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:22,826 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] [2020-10-19 18:29:23,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-19 18:29:23,042 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]=== [2020-10-19 18:29:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1156205799, now seen corresponding path program 1 times [2020-10-19 18:29:23,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:23,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695538204] [2020-10-19 18:29:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 18:29:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:29:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-19 18:29:23,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695538204] [2020-10-19 18:29:23,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386361972] [2020-10-19 18:29:23,122 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:29:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:29:23,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:29:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-19 18:29:23,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:29:23,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-19 18:29:23,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645755711] [2020-10-19 18:29:23,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:29:23,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:23,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:29:23,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:29:23,211 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand 8 states. [2020-10-19 18:29:23,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:23,284 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2020-10-19 18:29:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:29:23,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-19 18:29:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:23,287 INFO L225 Difference]: With dead ends: 224 [2020-10-19 18:29:23,287 INFO L226 Difference]: Without dead ends: 145 [2020-10-19 18:29:23,288 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 [2020-10-19 18:29:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-19 18:29:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-10-19 18:29:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-19 18:29:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2020-10-19 18:29:23,299 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 43 [2020-10-19 18:29:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:23,299 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2020-10-19 18:29:23,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:29:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2020-10-19 18:29:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-19 18:29:23,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:23,301 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] [2020-10-19 18:29:23,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 18:29:23,516 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]=== [2020-10-19 18:29:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:23,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1154921966, now seen corresponding path program 1 times [2020-10-19 18:29:23,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:23,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371742113] [2020-10-19 18:29:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 18:29:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:29:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-19 18:29:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-19 18:29:23,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371742113] [2020-10-19 18:29:23,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:23,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 18:29:23,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590624373] [2020-10-19 18:29:23,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:29:23,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:29:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:29:23,548 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand 3 states. [2020-10-19 18:29:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:23,558 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-19 18:29:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:29:23,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-10-19 18:29:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:23,560 INFO L225 Difference]: With dead ends: 132 [2020-10-19 18:29:23,560 INFO L226 Difference]: Without dead ends: 131 [2020-10-19 18:29:23,560 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 [2020-10-19 18:29:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-19 18:29:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-19 18:29:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-19 18:29:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2020-10-19 18:29:23,570 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 43 [2020-10-19 18:29:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:23,571 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2020-10-19 18:29:23,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:29:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2020-10-19 18:29:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-19 18:29:23,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:23,572 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] [2020-10-19 18:29:23,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 18:29:23,573 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]=== [2020-10-19 18:29:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1442842648, now seen corresponding path program 1 times [2020-10-19 18:29:23,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:23,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924519808] [2020-10-19 18:29:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 18:29:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:29:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-19 18:29:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-19 18:29:23,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924519808] [2020-10-19 18:29:23,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:29:23,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:29:23,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067738936] [2020-10-19 18:29:23,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:29:23,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:23,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:29:23,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:29:23,616 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand 4 states. [2020-10-19 18:29:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:23,632 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2020-10-19 18:29:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:29:23,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-19 18:29:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:23,635 INFO L225 Difference]: With dead ends: 140 [2020-10-19 18:29:23,635 INFO L226 Difference]: Without dead ends: 132 [2020-10-19 18:29:23,635 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 [2020-10-19 18:29:23,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-19 18:29:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-19 18:29:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-19 18:29:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 161 transitions. [2020-10-19 18:29:23,646 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 161 transitions. Word has length 44 [2020-10-19 18:29:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:23,646 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 161 transitions. [2020-10-19 18:29:23,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:29:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 161 transitions. [2020-10-19 18:29:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-19 18:29:23,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:29:23,649 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] [2020-10-19 18:29:23,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 18:29:23,649 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]=== [2020-10-19 18:29:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:29:23,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1995865818, now seen corresponding path program 2 times [2020-10-19 18:29:23,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:29:23,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270396263] [2020-10-19 18:29:23,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:29:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 18:29:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 18:29:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:29:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-19 18:29:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 18:29:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 18:29:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 18:29:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:29:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-19 18:29:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270396263] [2020-10-19 18:29:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984211872] [2020-10-19 18:29:23,761 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 [2020-10-19 18:29:23,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:29:23,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:29:23,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:29:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:29:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-19 18:29:23,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:29:23,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-19 18:29:23,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174281337] [2020-10-19 18:29:23,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:29:23,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:29:23,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:29:23,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:29:23,865 INFO L87 Difference]: Start difference. First operand 132 states and 161 transitions. Second operand 9 states. [2020-10-19 18:29:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:29:23,962 INFO L93 Difference]: Finished difference Result 173 states and 211 transitions. [2020-10-19 18:29:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:29:23,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-10-19 18:29:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:29:23,964 INFO L225 Difference]: With dead ends: 173 [2020-10-19 18:29:23,964 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:29:23,965 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 [2020-10-19 18:29:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:29:23,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:29:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:29:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:29:23,966 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2020-10-19 18:29:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:29:23,967 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:29:23,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:29:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:29:23,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:29:24,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-19 18:29:24,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-19 18:29:24,537 INFO L274 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,538 INFO L274 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2020-10-19 18:29:24,538 INFO L274 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,538 INFO L274 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2020-10-19 18:29:24,538 INFO L274 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,538 INFO L277 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2020-10-19 18:29:24,539 INFO L274 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,539 INFO L274 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-10-19 18:29:24,539 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))) [2020-10-19 18:29:24,539 INFO L274 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,539 INFO L274 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,540 INFO L274 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,540 INFO L274 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,540 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))) [2020-10-19 18:29:24,540 INFO L274 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,540 INFO L274 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,540 INFO L274 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,540 INFO L274 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,541 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)))) [2020-10-19 18:29:24,541 INFO L274 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,541 INFO L274 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,541 INFO L274 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2020-10-19 18:29:24,541 INFO L274 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,541 INFO L274 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2020-10-19 18:29:24,541 INFO L274 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2020-10-19 18:29:24,542 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))) [2020-10-19 18:29:24,542 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,542 INFO L274 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-10-19 18:29:24,542 INFO L274 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,542 INFO L274 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,542 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))) [2020-10-19 18:29:24,542 INFO L274 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,542 INFO L274 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,543 INFO L274 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,543 INFO L277 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2020-10-19 18:29:24,543 INFO L274 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,543 INFO L274 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,543 INFO L274 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-10-19 18:29:24,543 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-19 18:29:24,543 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-19 18:29:24,544 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-19 18:29:24,544 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-10-19 18:29:24,544 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-19 18:29:24,544 INFO L274 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-10-19 18:29:24,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:29:24 BoogieIcfgContainer [2020-10-19 18:29:24,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:29:24,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:29:24,552 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:29:24,552 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:29:24,552 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:29:20" (3/4) ... [2020-10-19 18:29:24,556 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:29:24,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2020-10-19 18:29:24,563 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2020-10-19 18:29:24,569 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-19 18:29:24,569 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:29:24,624 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:29:24,624 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:29:24,626 INFO L168 Benchmark]: Toolchain (without parser) took 4942.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.9 MB). Free memory was 958.6 MB in the beginning and 1.0 GB in the end (delta: -54.1 MB). Peak memory consumption was 149.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:29:24,627 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:29:24,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.48 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:29:24,628 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -185.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:29:24,628 INFO L168 Benchmark]: Boogie Preprocessor took 17.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:29:24,629 INFO L168 Benchmark]: RCFGBuilder took 278.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:29:24,629 INFO L168 Benchmark]: TraceAbstraction took 4214.43 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 86.9 MB). Peak memory consumption was 154.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:29:24,630 INFO L168 Benchmark]: Witness Printer took 72.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:29:24,632 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 268.48 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 80.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -185.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.26 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 278.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.3 MB). Peak memory consumption was 26.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4214.43 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 86.9 MB). Peak memory consumption was 154.0 MB. Max. memory is 11.5 GB. * Witness Printer took 72.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 11.5 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: 3.7s, 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, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 354 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s 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, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s 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...