/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/s1liff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:00:26,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:00:26,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:00:26,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:00:26,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:00:26,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:00:26,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:00:26,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:00:26,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:00:26,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:00:26,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:00:26,165 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:00:26,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:00:26,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:00:26,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:00:26,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:00:26,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:00:26,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:00:26,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:00:26,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:00:26,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:00:26,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:00:26,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:00:26,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:00:26,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:00:26,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:00:26,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:00:26,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:00:26,193 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 23:00:26,202 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:00:26,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:00:26,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:00:26,204 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:00:26,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:00:26,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:00:26,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:00:26,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:00:26,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:00:26,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:00:26,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:00:26,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:00:26,206 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:00:26,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:00:26,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:00:26,206 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:00:26,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:00:26,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:00:26,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:00:26,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:00:26,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:00:26,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:00:26,208 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 23:00:26,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:00:26,522 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:00:26,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:00:26,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:00:26,529 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:00:26,530 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1liff.c [2020-08-22 23:00:26,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0897e5a50/269fb9192d81444397e407d9dd496e1a/FLAGd2bd35401 [2020-08-22 23:00:27,155 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:00:27,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1liff.c [2020-08-22 23:00:27,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0897e5a50/269fb9192d81444397e407d9dd496e1a/FLAGd2bd35401 [2020-08-22 23:00:27,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0897e5a50/269fb9192d81444397e407d9dd496e1a [2020-08-22 23:00:27,533 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:00:27,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:00:27,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:27,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:00:27,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:00:27,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9bd89c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27, skipping insertion in model container [2020-08-22 23:00:27,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:00:27,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:00:27,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:27,781 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:00:27,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:27,825 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:00:27,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27 WrapperNode [2020-08-22 23:00:27,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:27,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:00:27,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:00:27,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:00:27,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (1/1) ... [2020-08-22 23:00:27,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:00:27,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:00:27,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:00:27,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:00:27,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (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 23:00:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:00:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:00:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:00:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:00:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:00:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:00:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:00:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:00:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:00:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:00:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 23:00:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:00:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:00:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 23:00:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:00:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:00:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:00:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:00:28,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:00:28,355 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:00:28,356 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 23:00:28,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:28 BoogieIcfgContainer [2020-08-22 23:00:28,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:00:28,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:00:28,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:00:28,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:00:28,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:00:27" (1/3) ... [2020-08-22 23:00:28,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d99555a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:28, skipping insertion in model container [2020-08-22 23:00:28,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:27" (2/3) ... [2020-08-22 23:00:28,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d99555a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:28, skipping insertion in model container [2020-08-22 23:00:28,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:28" (3/3) ... [2020-08-22 23:00:28,382 INFO L109 eAbstractionObserver]: Analyzing ICFG s1liff.c [2020-08-22 23:00:28,407 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:00:28,425 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:00:28,459 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:00:28,488 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:00:28,489 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:00:28,489 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:00:28,489 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:00:28,489 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:00:28,489 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:00:28,490 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:00:28,490 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:00:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-08-22 23:00:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:28,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:28,523 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] [2020-08-22 23:00:28,524 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:28,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:28,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2050446892, now seen corresponding path program 1 times [2020-08-22 23:00:28,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:28,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030694753] [2020-08-22 23:00:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:28,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:28,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:28,782 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 23:00:28,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030694753] [2020-08-22 23:00:28,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:28,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:00:28,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515880824] [2020-08-22 23:00:28,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:00:28,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:00:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:00:28,813 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-08-22 23:00:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:29,063 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-08-22 23:00:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:00:29,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 23:00:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:29,077 INFO L225 Difference]: With dead ends: 125 [2020-08-22 23:00:29,078 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 23:00:29,083 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 23:00:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 23:00:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-08-22 23:00:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 23:00:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-22 23:00:29,144 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2020-08-22 23:00:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:29,145 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-22 23:00:29,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:00:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-22 23:00:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:29,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:29,147 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] [2020-08-22 23:00:29,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:00:29,148 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash -341126016, now seen corresponding path program 1 times [2020-08-22 23:00:29,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:29,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797956059] [2020-08-22 23:00:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:29,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:29,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:29,356 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 23:00:29,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797956059] [2020-08-22 23:00:29,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:29,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:00:29,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400731125] [2020-08-22 23:00:29,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:00:29,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:29,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:00:29,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:00:29,366 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 5 states. [2020-08-22 23:00:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:29,612 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-08-22 23:00:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:00:29,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-22 23:00:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:29,614 INFO L225 Difference]: With dead ends: 115 [2020-08-22 23:00:29,614 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 23:00:29,616 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 23:00:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 23:00:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-08-22 23:00:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 23:00:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-08-22 23:00:29,634 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2020-08-22 23:00:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:29,635 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-08-22 23:00:29,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:00:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-08-22 23:00:29,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 23:00:29,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:29,637 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:00:29,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:00:29,638 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash 746418975, now seen corresponding path program 1 times [2020-08-22 23:00:29,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:29,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622761949] [2020-08-22 23:00:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:00:29,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:00:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:00:29,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:00:29,799 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:00:29,799 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:00:29,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:00:29,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:00:29 BoogieIcfgContainer [2020-08-22 23:00:29,852 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:00:29,855 INFO L168 Benchmark]: Toolchain (without parser) took 2319.60 ms. Allocated memory was 136.8 MB in the beginning and 229.6 MB in the end (delta: 92.8 MB). Free memory was 100.8 MB in the beginning and 192.4 MB in the end (delta: -91.6 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:29,856 INFO L168 Benchmark]: CDTParser took 1.03 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-22 23:00:29,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.62 ms. Allocated memory is still 136.8 MB. Free memory was 100.8 MB in the beginning and 90.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:29,858 INFO L168 Benchmark]: Boogie Preprocessor took 131.49 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 90.2 MB in the beginning and 177.4 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:29,859 INFO L168 Benchmark]: RCFGBuilder took 413.21 ms. Allocated memory is still 200.3 MB. Free memory was 177.4 MB in the beginning and 156.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:29,860 INFO L168 Benchmark]: TraceAbstraction took 1479.14 ms. Allocated memory was 200.3 MB in the beginning and 229.6 MB in the end (delta: 29.4 MB). Free memory was 156.7 MB in the beginning and 192.4 MB in the end (delta: -35.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 23:00:29,865 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.03 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.0 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.62 ms. Allocated memory is still 136.8 MB. Free memory was 100.8 MB in the beginning and 90.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.49 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 90.2 MB in the beginning and 177.4 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.21 ms. Allocated memory is still 200.3 MB. Free memory was 177.4 MB in the beginning and 156.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1479.14 ms. Allocated memory was 200.3 MB in the beginning and 229.6 MB in the end (delta: 29.4 MB). Free memory was 156.7 MB in the beginning and 192.4 MB in the end (delta: -35.7 MB). There was no memory consumed. 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)=10, 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={5:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L29] sum[0] = N VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] COND TRUE i