/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/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:59:36,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:59:36,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:59:36,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:59:36,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:59:36,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:59:36,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:59:36,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:59:36,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:59:36,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:59:36,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:59:36,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:59:36,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:59:36,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:59:36,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:59:36,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:59:36,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:59:36,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:59:36,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:59:36,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:59:36,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:59:36,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:59:36,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:59:36,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:59:36,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:59:36,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:59:36,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:59:36,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:59:36,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:59:36,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 22:59:36,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:59:36,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:59:36,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:59:36,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:59:36,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:59:36,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:59:36,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:59:36,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:59:36,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:59:36,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:59:36,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:59:36,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:59:36,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:59:36,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:59:36,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:59:36,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:59:36,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:59:36,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:59:36,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:59:36,744 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:59:36,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:59:36,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:59:36,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:59:36,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:59:36,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:59:36,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:59:36,746 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 [2020-08-22 22:59:37,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:59:37,096 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:59:37,100 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:59:37,102 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:59:37,103 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:59:37,104 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2020-08-22 22:59:37,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb409c659/41bed3e4254246bdbb4b6e4e88398706/FLAG960aa243e [2020-08-22 22:59:37,704 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:59:37,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs4f.c [2020-08-22 22:59:37,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb409c659/41bed3e4254246bdbb4b6e4e88398706/FLAG960aa243e [2020-08-22 22:59:38,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb409c659/41bed3e4254246bdbb4b6e4e88398706 [2020-08-22 22:59:38,076 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:59:38,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:59:38,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:38,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:59:38,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:59:38,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43bce7fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38, skipping insertion in model container [2020-08-22 22:59:38,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:59:38,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:59:38,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:38,359 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:59:38,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:38,401 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:59:38,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38 WrapperNode [2020-08-22 22:59:38,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:38,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:59:38,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:59:38,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:59:38,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (1/1) ... [2020-08-22 22:59:38,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:59:38,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:59:38,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:59:38,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:59:38,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (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 [2020-08-22 22:59:38,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:59:38,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:59:38,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 22:59:38,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 22:59:38,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:59:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:59:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:59:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 22:59:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 22:59:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:59:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:59:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:59:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:59:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:59:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:59:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:59:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:59:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:59:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:59:38,947 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:59:38,947 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 22:59:38,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:38 BoogieIcfgContainer [2020-08-22 22:59:38,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:59:38,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:59:38,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:59:38,960 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:59:38,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:59:38" (1/3) ... [2020-08-22 22:59:38,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f370bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:38, skipping insertion in model container [2020-08-22 22:59:38,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:38" (2/3) ... [2020-08-22 22:59:38,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f370bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:38, skipping insertion in model container [2020-08-22 22:59:38,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:38" (3/3) ... [2020-08-22 22:59:38,964 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-08-22 22:59:38,978 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:59:38,988 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:59:39,005 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:59:39,031 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:59:39,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:59:39,032 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:59:39,032 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:59:39,033 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:59:39,033 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:59:39,033 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:59:39,033 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:59:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-08-22 22:59:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 22:59:39,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:39,067 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] [2020-08-22 22:59:39,067 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:39,075 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-08-22 22:59:39,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:39,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959314617] [2020-08-22 22:59:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:39,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959314617] [2020-08-22 22:59:39,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:39,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:59:39,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323571351] [2020-08-22 22:59:39,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:59:39,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:39,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:59:39,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:59:39,348 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-08-22 22:59:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:39,558 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-08-22 22:59:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:59:39,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 22:59:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:39,570 INFO L225 Difference]: With dead ends: 101 [2020-08-22 22:59:39,570 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 22:59:39,575 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 [2020-08-22 22:59:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 22:59:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-22 22:59:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 22:59:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-08-22 22:59:39,629 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-08-22 22:59:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:39,630 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-08-22 22:59:39,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:59:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-08-22 22:59:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 22:59:39,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:39,632 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] [2020-08-22 22:59:39,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:59:39,633 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash -151091841, now seen corresponding path program 1 times [2020-08-22 22:59:39,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:39,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564467150] [2020-08-22 22:59:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:39,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564467150] [2020-08-22 22:59:39,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:39,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:59:39,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242237152] [2020-08-22 22:59:39,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:59:39,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:39,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:59:39,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:59:39,778 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-08-22 22:59:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:39,988 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-08-22 22:59:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:59:39,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 22:59:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:39,990 INFO L225 Difference]: With dead ends: 81 [2020-08-22 22:59:39,991 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 22:59:39,992 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 [2020-08-22 22:59:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 22:59:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-08-22 22:59:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 22:59:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-22 22:59:40,009 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 30 [2020-08-22 22:59:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:40,010 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-22 22:59:40,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:59:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-22 22:59:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 22:59:40,011 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:40,012 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] [2020-08-22 22:59:40,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:59:40,012 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:40,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-08-22 22:59:40,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:40,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279709359] [2020-08-22 22:59:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:59:40,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:59:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:59:40,147 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:59:40,198 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:59:40,199 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:59:40,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:59:40,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:59:40 BoogieIcfgContainer [2020-08-22 22:59:40,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:59:40,309 INFO L168 Benchmark]: Toolchain (without parser) took 2230.47 ms. Allocated memory was 138.9 MB in the beginning and 235.9 MB in the end (delta: 97.0 MB). Free memory was 102.9 MB in the beginning and 205.9 MB in the end (delta: -103.0 MB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:40,311 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:59:40,312 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.46 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 92.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:40,313 INFO L168 Benchmark]: Boogie Preprocessor took 141.29 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.2 MB in the beginning and 180.1 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:40,314 INFO L168 Benchmark]: RCFGBuilder took 410.01 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 160.9 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:40,315 INFO L168 Benchmark]: TraceAbstraction took 1350.25 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 160.9 MB in the beginning and 205.9 MB in the end (delta: -45.0 MB). Peak memory consumption was 79.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:40,319 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 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.46 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 92.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.29 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.2 MB in the beginning and 180.1 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.01 ms. Allocated memory is still 202.9 MB. Free memory was 180.1 MB in the beginning and 160.9 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1350.25 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 160.9 MB in the beginning and 205.9 MB in the end (delta: -45.0 MB). Peak memory consumption was 79.1 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)=42, 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