/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/indp4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:00:04,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:00:04,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:00:04,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:00:04,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:00:04,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:00:04,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:00:04,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:00:04,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:00:04,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:00:04,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:00:04,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:00:04,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:00:04,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:00:04,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:00:04,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:00:04,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:00:04,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:00:04,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:00:04,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:00:04,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:00:04,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:00:04,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:00:04,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:00:04,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:00:04,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:00:04,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:00:04,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:00:04,307 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 23:00:04,327 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:00:04,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:00:04,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:00:04,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:00:04,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:00:04,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:00:04,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:00:04,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:00:04,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:00:04,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:00:04,333 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:00:04,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:00:04,333 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:00:04,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:00:04,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:00:04,334 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:00:04,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:00:04,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:00:04,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:00:04,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:00:04,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:00:04,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:00:04,336 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 23:00:04,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:00:04,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:00:04,634 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:00:04,636 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:00:04,637 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:00:04,637 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/indp4f.c [2020-08-22 23:00:04,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d75794fa/12486649e4494125a74f2829102ece6c/FLAG24f8e27c0 [2020-08-22 23:00:05,230 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:00:05,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/indp4f.c [2020-08-22 23:00:05,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d75794fa/12486649e4494125a74f2829102ece6c/FLAG24f8e27c0 [2020-08-22 23:00:05,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d75794fa/12486649e4494125a74f2829102ece6c [2020-08-22 23:00:05,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:00:05,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:00:05,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:05,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:00:05,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:00:05,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a706625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05, skipping insertion in model container [2020-08-22 23:00:05,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:00:05,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:00:05,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:05,801 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:00:05,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:05,835 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:00:05,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05 WrapperNode [2020-08-22 23:00:05,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:05,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:00:05,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:00:05,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:00:05,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (1/1) ... [2020-08-22 23:00:05,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:00:05,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:00:05,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:00:05,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:00:05,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (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 23:00:06,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:00:06,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:00:06,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:00:06,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:00:06,021 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:00:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:00:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:00:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:00:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:00:06,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:00:06,285 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:00:06,285 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-22 23:00:06,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:06 BoogieIcfgContainer [2020-08-22 23:00:06,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:00:06,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:00:06,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:00:06,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:00:06,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:00:05" (1/3) ... [2020-08-22 23:00:06,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac5586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:06, skipping insertion in model container [2020-08-22 23:00:06,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:05" (2/3) ... [2020-08-22 23:00:06,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac5586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:06, skipping insertion in model container [2020-08-22 23:00:06,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:06" (3/3) ... [2020-08-22 23:00:06,301 INFO L109 eAbstractionObserver]: Analyzing ICFG indp4f.c [2020-08-22 23:00:06,317 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:00:06,325 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:00:06,341 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:00:06,368 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:00:06,368 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:00:06,368 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:00:06,369 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:00:06,369 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:00:06,369 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:00:06,369 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:00:06,369 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:00:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-08-22 23:00:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:06,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:06,402 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 23:00:06,403 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:06,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1846170158, now seen corresponding path program 1 times [2020-08-22 23:00:06,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:06,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67368653] [2020-08-22 23:00:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:06,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:06,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:06,658 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 23:00:06,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67368653] [2020-08-22 23:00:06,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:06,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:00:06,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338692000] [2020-08-22 23:00:06,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:00:06,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:06,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:00:06,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:00:06,693 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 3 states. [2020-08-22 23:00:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:06,868 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-08-22 23:00:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:00:06,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 23:00:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:06,880 INFO L225 Difference]: With dead ends: 109 [2020-08-22 23:00:06,880 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 23:00:06,884 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 23:00:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 23:00:06,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-22 23:00:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 23:00:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-08-22 23:00:06,937 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 33 [2020-08-22 23:00:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:06,937 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-08-22 23:00:06,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:00:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-08-22 23:00:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:06,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:06,940 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 23:00:06,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:00:06,941 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:06,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1457656721, now seen corresponding path program 1 times [2020-08-22 23:00:06,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:06,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266481877] [2020-08-22 23:00:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:07,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:07,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:07,063 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 23:00:07,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266481877] [2020-08-22 23:00:07,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:07,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:00:07,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305018007] [2020-08-22 23:00:07,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:00:07,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:07,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:00:07,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:00:07,067 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 5 states. [2020-08-22 23:00:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:07,300 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-08-22 23:00:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:00:07,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-22 23:00:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:07,304 INFO L225 Difference]: With dead ends: 108 [2020-08-22 23:00:07,305 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 23:00:07,306 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 23:00:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 23:00:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-08-22 23:00:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 23:00:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-22 23:00:07,341 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2020-08-22 23:00:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:07,341 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-22 23:00:07,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:00:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-22 23:00:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 23:00:07,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:07,343 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] [2020-08-22 23:00:07,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:00:07,344 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:07,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:07,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1203755678, now seen corresponding path program 1 times [2020-08-22 23:00:07,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:07,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680909933] [2020-08-22 23:00:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:07,364 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 23:00:07,364 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-22 23:00:07,364 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:00:07,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:00:07,389 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-22 23:00:07,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:00:07 BoogieIcfgContainer [2020-08-22 23:00:07,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:00:07,392 INFO L168 Benchmark]: Toolchain (without parser) took 1834.65 ms. Allocated memory was 139.5 MB in the beginning and 236.5 MB in the end (delta: 97.0 MB). Free memory was 103.8 MB in the beginning and 202.8 MB in the end (delta: -99.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 23:00:07,393 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-08-22 23:00:07,394 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.63 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 93.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:07,396 INFO L168 Benchmark]: Boogie Preprocessor took 118.71 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 180.3 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:07,396 INFO L168 Benchmark]: RCFGBuilder took 337.72 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 160.7 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:07,397 INFO L168 Benchmark]: TraceAbstraction took 1095.05 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 160.7 MB in the beginning and 202.8 MB in the end (delta: -42.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 23:00:07,401 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.63 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 93.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.71 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 180.3 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.72 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 160.7 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1095.05 ms. Allocated memory was 202.9 MB in the beginning and 236.5 MB in the end (delta: 33.6 MB). Free memory was 160.7 MB in the beginning and 202.8 MB in the end (delta: -42.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L28] i=0 [L28] COND TRUE i