/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:09:02,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:09:02,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:09:02,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:09:02,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:09:02,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:09:02,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:09:02,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:09:02,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:09:02,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:09:02,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:09:02,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:09:02,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:09:02,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:09:02,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:09:02,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:09:02,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:09:02,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:09:02,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:09:02,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:09:02,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:09:02,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:09:02,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:09:02,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:09:02,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:09:02,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:09:02,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:09:02,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:09:02,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:09:02,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:09:02,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:09:02,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:09:02,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:09:02,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:09:02,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:09:02,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:09:02,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:09:02,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:09:02,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:09:02,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:09:02,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:09:02,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:09:02,483 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:09:02,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:09:02,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:09:02,486 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:09:02,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:09:02,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:09:02,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:09:02,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:09:02,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:09:02,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:09:02,489 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:09:02,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:09:02,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:09:02,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:09:02,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:09:02,490 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:09:02,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:09:02,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:09:02,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:09:02,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:09:02,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:09:02,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:09:02,491 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 23:09:02,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:09:02,951 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:09:02,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:09:02,960 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:09:02,960 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:09:02,961 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-09-04 23:09:03,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fa4dd6bc/f31ec4fa9e3e4be78820a2f4eefa2150/FLAG4807a10e0 [2020-09-04 23:09:03,631 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:09:03,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-09-04 23:09:03,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fa4dd6bc/f31ec4fa9e3e4be78820a2f4eefa2150/FLAG4807a10e0 [2020-09-04 23:09:03,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8fa4dd6bc/f31ec4fa9e3e4be78820a2f4eefa2150 [2020-09-04 23:09:03,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:09:03,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:09:03,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:03,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:09:03,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:09:03,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:03" (1/1) ... [2020-09-04 23:09:03,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1850e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:03, skipping insertion in model container [2020-09-04 23:09:03,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:03" (1/1) ... [2020-09-04 23:09:04,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:09:04,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:09:04,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:04,261 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:09:04,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:04,307 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:09:04,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04 WrapperNode [2020-09-04 23:09:04,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:04,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:09:04,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:09:04,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:09:04,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (1/1) ... [2020-09-04 23:09:04,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (1/1) ... [2020-09-04 23:09:04,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (1/1) ... [2020-09-04 23:09:04,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (1/1) ... [2020-09-04 23:09:04,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (1/1) ... [2020-09-04 23:09:04,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (1/1) ... [2020-09-04 23:09:04,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (1/1) ... [2020-09-04 23:09:04,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:09:04,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:09:04,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:09:04,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:09:04,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 23:09:04,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:09:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:09:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:09:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:09:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:09:04,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:09:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:09:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:09:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:09:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:09:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 23:09:04,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:09:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:09:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 23:09:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:09:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:09:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:09:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:09:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:09:04,857 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:09:04,858 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 23:09:04,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:04 BoogieIcfgContainer [2020-09-04 23:09:04,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:09:04,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:09:04,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:09:04,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:09:04,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:09:03" (1/3) ... [2020-09-04 23:09:04,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d08a10b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:04, skipping insertion in model container [2020-09-04 23:09:04,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:04" (2/3) ... [2020-09-04 23:09:04,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d08a10b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:04, skipping insertion in model container [2020-09-04 23:09:04,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:04" (3/3) ... [2020-09-04 23:09:04,876 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-09-04 23:09:04,889 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:09:04,900 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:09:04,923 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:09:04,953 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:09:04,953 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:09:04,953 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:09:04,953 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:09:04,953 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:09:04,954 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:09:04,954 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:09:04,954 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:09:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-09-04 23:09:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 23:09:04,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:04,990 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 23:09:04,990 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:04,998 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-09-04 23:09:05,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:05,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78798209] [2020-09-04 23:09:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:05,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:05,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:09:05,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78798209] [2020-09-04 23:09:05,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:05,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:09:05,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721704342] [2020-09-04 23:09:05,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:09:05,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:09:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:05,287 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-09-04 23:09:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:05,461 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-09-04 23:09:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:09:05,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-04 23:09:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:05,475 INFO L225 Difference]: With dead ends: 101 [2020-09-04 23:09:05,476 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 23:09:05,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 23:09:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-04 23:09:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 23:09:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-09-04 23:09:05,535 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-09-04 23:09:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:05,536 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-09-04 23:09:05,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:09:05,536 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-09-04 23:09:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 23:09:05,538 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:05,538 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 23:09:05,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:09:05,539 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:05,540 INFO L82 PathProgramCache]: Analyzing trace with hash -151091841, now seen corresponding path program 1 times [2020-09-04 23:09:05,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:05,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765591711] [2020-09-04 23:09:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:05,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:05,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:09:05,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765591711] [2020-09-04 23:09:05,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:05,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:09:05,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651154432] [2020-09-04 23:09:05,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:09:05,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:05,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:09:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:09:05,685 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-09-04 23:09:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:05,865 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-09-04 23:09:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:09:05,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-04 23:09:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:05,868 INFO L225 Difference]: With dead ends: 81 [2020-09-04 23:09:05,868 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 23:09:05,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:09:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 23:09:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-09-04 23:09:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 23:09:05,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-09-04 23:09:05,886 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 30 [2020-09-04 23:09:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:05,886 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-09-04 23:09:05,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:09:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-09-04 23:09:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 23:09:05,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:05,889 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:05,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:09:05,889 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:05,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-09-04 23:09:05,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:05,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781963361] [2020-09-04 23:09:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:06,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:06,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 23:09:06,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781963361] [2020-09-04 23:09:06,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:06,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 23:09:06,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253957214] [2020-09-04 23:09:06,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 23:09:06,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 23:09:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:09:06,110 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 8 states. [2020-09-04 23:09:06,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:06,354 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-04 23:09:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:09:06,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-09-04 23:09:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:06,356 INFO L225 Difference]: With dead ends: 66 [2020-09-04 23:09:06,356 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 23:09:06,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:09:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 23:09:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-09-04 23:09:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 23:09:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-09-04 23:09:06,370 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 42 [2020-09-04 23:09:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:06,371 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-09-04 23:09:06,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 23:09:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-09-04 23:09:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-04 23:09:06,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:06,373 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:06,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:09:06,373 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:06,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1747495296, now seen corresponding path program 1 times [2020-09-04 23:09:06,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:06,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997655803] [2020-09-04 23:09:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:06,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:06,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:09:06,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997655803] [2020-09-04 23:09:06,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:06,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:09:06,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015057471] [2020-09-04 23:09:06,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:09:06,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:09:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:09:06,574 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 10 states. [2020-09-04 23:09:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:06,860 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-09-04 23:09:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:09:06,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 52 [2020-09-04 23:09:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:06,862 INFO L225 Difference]: With dead ends: 94 [2020-09-04 23:09:06,862 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 23:09:06,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:09:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 23:09:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-09-04 23:09:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 23:09:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-09-04 23:09:06,876 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 52 [2020-09-04 23:09:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:06,877 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-09-04 23:09:06,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:09:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-09-04 23:09:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 23:09:06,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:06,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:06,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:09:06,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1872706551, now seen corresponding path program 2 times [2020-09-04 23:09:06,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:06,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506685169] [2020-09-04 23:09:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:07,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:07,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 23:09:07,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506685169] [2020-09-04 23:09:07,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:07,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:09:07,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116581755] [2020-09-04 23:09:07,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:09:07,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:07,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:09:07,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:09:07,037 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 6 states. [2020-09-04 23:09:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:07,213 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2020-09-04 23:09:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:09:07,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-09-04 23:09:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:07,215 INFO L225 Difference]: With dead ends: 94 [2020-09-04 23:09:07,215 INFO L226 Difference]: Without dead ends: 63 [2020-09-04 23:09:07,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 23:09:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-04 23:09:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-09-04 23:09:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-04 23:09:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-09-04 23:09:07,227 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-09-04 23:09:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:07,227 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-09-04 23:09:07,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:09:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-09-04 23:09:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 23:09:07,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:07,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:07,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:09:07,230 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:07,231 INFO L82 PathProgramCache]: Analyzing trace with hash -557611095, now seen corresponding path program 1 times [2020-09-04 23:09:07,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:07,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259349735] [2020-09-04 23:09:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:07,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:07,319 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:07,368 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:09:07,368 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:09:07,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:09:07,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:09:07 BoogieIcfgContainer [2020-09-04 23:09:07,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:09:07,469 INFO L168 Benchmark]: Toolchain (without parser) took 3486.39 ms. Allocated memory was 140.5 MB in the beginning and 244.8 MB in the end (delta: 104.3 MB). Free memory was 103.0 MB in the beginning and 187.6 MB in the end (delta: -84.6 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:07,470 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-04 23:09:07,471 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.65 ms. Allocated memory is still 140.5 MB. Free memory was 102.6 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:07,472 INFO L168 Benchmark]: Boogie Preprocessor took 128.09 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.2 MB in the beginning and 181.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:07,473 INFO L168 Benchmark]: RCFGBuilder took 428.73 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:07,474 INFO L168 Benchmark]: TraceAbstraction took 2598.32 ms. Allocated memory was 203.9 MB in the beginning and 244.8 MB in the end (delta: 40.9 MB). Free memory was 162.3 MB in the beginning and 187.6 MB in the end (delta: -25.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:07,478 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 324.65 ms. Allocated memory is still 140.5 MB. Free memory was 102.6 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.09 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.2 MB in the beginning and 181.4 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.73 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.9 MB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2598.32 ms. Allocated memory was 203.9 MB in the beginning and 244.8 MB in the end (delta: 40.9 MB). Free memory was 162.3 MB in the beginning and 187.6 MB in the end (delta: -25.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=32, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=2, N=2] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; VAL [\old(N)=0, N=2] [L26] long long sum[1]; VAL [\old(N)=0, N=2, sum={2:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L29] COND TRUE i