/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/brs1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:08:59,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:08:59,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:08:59,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:08:59,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:08:59,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:08:59,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:09:00,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:09:00,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:09:00,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:09:00,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:09:00,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:09:00,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:09:00,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:09:00,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:09:00,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:09:00,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:09:00,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:09:00,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:09:00,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:09:00,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:09:00,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:09:00,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:09:00,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:09:00,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:09:00,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:09:00,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:09:00,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:09:00,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:09:00,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:09:00,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:09:00,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:09:00,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:09:00,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:09:00,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:09:00,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:09:00,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:09:00,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:09:00,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:09:00,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:09:00,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:09:00,058 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 23:09:00,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:09:00,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:09:00,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:09:00,074 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:09:00,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:09:00,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:09:00,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:09:00,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:09:00,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:09:00,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:09:00,076 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:09:00,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:09:00,076 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:09:00,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:09:00,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:09:00,077 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:09:00,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:09:00,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:09:00,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:09:00,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:09:00,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:09:00,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:09:00,078 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 23:09:00,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:09:00,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:09:00,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:09:00,534 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:09:00,534 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:09:00,535 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1f.c [2020-09-04 23:09:00,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7efa686e/a8d56409e2364a1db75b0c47ccddf97c/FLAG77cdf10ee [2020-09-04 23:09:01,172 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:09:01,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs1f.c [2020-09-04 23:09:01,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7efa686e/a8d56409e2364a1db75b0c47ccddf97c/FLAG77cdf10ee [2020-09-04 23:09:01,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7efa686e/a8d56409e2364a1db75b0c47ccddf97c [2020-09-04 23:09:01,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:09:01,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:09:01,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:01,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:09:01,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:09:01,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544d7f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01, skipping insertion in model container [2020-09-04 23:09:01,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:09:01,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:09:01,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:01,805 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:09:01,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:01,851 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:09:01,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01 WrapperNode [2020-09-04 23:09:01,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:01,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:09:01,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:09:01,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:09:01,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (1/1) ... [2020-09-04 23:09:01,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:09:01,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:09:01,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:09:01,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:09:01,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (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 23:09:02,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:09:02,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:09:02,054 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:09:02,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:09:02,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:09:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:09:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:09:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:09:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:09:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:09:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 23:09:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:09:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:09:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 23:09:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:09:02,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:09:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:09:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:09:02,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:09:02,410 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:09:02,411 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 23:09:02,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:02 BoogieIcfgContainer [2020-09-04 23:09:02,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:09:02,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:09:02,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:09:02,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:09:02,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:09:01" (1/3) ... [2020-09-04 23:09:02,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd3fe12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:02, skipping insertion in model container [2020-09-04 23:09:02,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:01" (2/3) ... [2020-09-04 23:09:02,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd3fe12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:02, skipping insertion in model container [2020-09-04 23:09:02,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:02" (3/3) ... [2020-09-04 23:09:02,425 INFO L109 eAbstractionObserver]: Analyzing ICFG brs1f.c [2020-09-04 23:09:02,436 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:09:02,444 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:09:02,465 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:09:02,493 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:09:02,493 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:09:02,494 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:09:02,494 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:09:02,494 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:09:02,494 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:09:02,494 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:09:02,494 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:09:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-09-04 23:09:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 23:09:02,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:02,529 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 23:09:02,529 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-09-04 23:09:02,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:02,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033099473] [2020-09-04 23:09:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:02,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:02,780 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 23:09:02,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033099473] [2020-09-04 23:09:02,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:02,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:09:02,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275228993] [2020-09-04 23:09:02,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:09:02,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:09:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:02,816 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-09-04 23:09:03,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:03,007 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2020-09-04 23:09:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:09:03,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-04 23:09:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:03,021 INFO L225 Difference]: With dead ends: 100 [2020-09-04 23:09:03,021 INFO L226 Difference]: Without dead ends: 46 [2020-09-04 23:09:03,026 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 23:09:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-04 23:09:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-09-04 23:09:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 23:09:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-04 23:09:03,083 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 30 [2020-09-04 23:09:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:03,083 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-04 23:09:03,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:09:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-04 23:09:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 23:09:03,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:03,085 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 23:09:03,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:09:03,086 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash -151091841, now seen corresponding path program 1 times [2020-09-04 23:09:03,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:03,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921817774] [2020-09-04 23:09:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:03,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:03,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:03,225 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 23:09:03,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921817774] [2020-09-04 23:09:03,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:03,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:09:03,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108648938] [2020-09-04 23:09:03,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:09:03,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:03,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:09:03,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:09:03,230 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 5 states. [2020-09-04 23:09:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:03,404 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-09-04 23:09:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:09:03,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-04 23:09:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:03,407 INFO L225 Difference]: With dead ends: 73 [2020-09-04 23:09:03,407 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 23:09:03,409 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 23:09:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 23:09:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-09-04 23:09:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 23:09:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-09-04 23:09:03,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 30 [2020-09-04 23:09:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:03,424 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-09-04 23:09:03,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:09:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-09-04 23:09:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 23:09:03,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:03,426 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 23:09:03,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:09:03,427 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:03,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-09-04 23:09:03,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:03,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040368253] [2020-09-04 23:09:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:03,467 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:03,535 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:03,583 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:09:03,584 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:09:03,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:09:03,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:09:03 BoogieIcfgContainer [2020-09-04 23:09:03,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:09:03,672 INFO L168 Benchmark]: Toolchain (without parser) took 2138.27 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.9 MB in the beginning and 91.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 73.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:03,674 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 23:09:03,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.43 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:03,676 INFO L168 Benchmark]: Boogie Preprocessor took 124.24 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 179.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:03,676 INFO L168 Benchmark]: RCFGBuilder took 438.43 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 161.1 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:03,677 INFO L168 Benchmark]: TraceAbstraction took 1251.49 ms. Allocated memory is still 201.9 MB. Free memory was 160.4 MB in the beginning and 91.4 MB in the end (delta: 69.1 MB). Peak memory consumption was 69.1 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:03,682 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.43 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 91.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.24 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 179.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 438.43 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 161.1 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1251.49 ms. Allocated memory is still 201.9 MB. Free memory was 160.4 MB in the beginning and 91.4 MB in the end (delta: 69.1 MB). Peak memory consumption was 69.1 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)=12, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; VAL [\old(N)=0, N=1] [L26] long long sum[1]; VAL [\old(N)=0, N=1, sum={2:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] COND TRUE i