/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/s12iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:00:24,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:00:24,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:00:24,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:00:24,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:00:24,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:00:24,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:00:24,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:00:24,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:00:24,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:00:24,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:00:24,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:00:24,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:00:24,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:00:24,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:00:24,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:00:24,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:00:24,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:00:24,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:00:24,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:00:24,574 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 23:00:24,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:00:24,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:00:24,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:00:24,587 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:00:24,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:00:24,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:00:24,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:00:24,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:00:24,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:00:24,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:00:24,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:00:24,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:00:24,589 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:00:24,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:00:24,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:00:24,589 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:00:24,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:00:24,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:00:24,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:00:24,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:00:24,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:00:24,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:00:24,591 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 23:00:24,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:00:24,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:00:24,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:00:24,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:00:24,906 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:00:24,906 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s12iff.c [2020-08-22 23:00:24,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d740e4a/458feebb2b46417d87e07f07a65fe165/FLAG0f5621bcf [2020-08-22 23:00:25,494 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:00:25,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s12iff.c [2020-08-22 23:00:25,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d740e4a/458feebb2b46417d87e07f07a65fe165/FLAG0f5621bcf [2020-08-22 23:00:25,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37d740e4a/458feebb2b46417d87e07f07a65fe165 [2020-08-22 23:00:25,877 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:00:25,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:00:25,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:25,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:00:25,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:00:25,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:25,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3178309e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:25, skipping insertion in model container [2020-08-22 23:00:25,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:25" (1/1) ... [2020-08-22 23:00:25,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:00:25,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:00:26,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:26,113 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:00:26,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:26,158 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:00:26,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26 WrapperNode [2020-08-22 23:00:26,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:26,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:00:26,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:00:26,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:00:26,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (1/1) ... [2020-08-22 23:00:26,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (1/1) ... [2020-08-22 23:00:26,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (1/1) ... [2020-08-22 23:00:26,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (1/1) ... [2020-08-22 23:00:26,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (1/1) ... [2020-08-22 23:00:26,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (1/1) ... [2020-08-22 23:00:26,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (1/1) ... [2020-08-22 23:00:26,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:00:26,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:00:26,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:00:26,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:00:26,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (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 23:00:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:00:26,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:00:26,366 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:00:26,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:00:26,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:00:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:00:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:00:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:00:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:00:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:00:26,367 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 23:00:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:00:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:00:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 23:00:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:00:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:00:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:00:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:00:26,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:00:26,730 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:00:26,730 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 23:00:26,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:26 BoogieIcfgContainer [2020-08-22 23:00:26,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:00:26,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:00:26,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:00:26,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:00:26,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:00:25" (1/3) ... [2020-08-22 23:00:26,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5445d42b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:26, skipping insertion in model container [2020-08-22 23:00:26,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:26" (2/3) ... [2020-08-22 23:00:26,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5445d42b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:26, skipping insertion in model container [2020-08-22 23:00:26,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:26" (3/3) ... [2020-08-22 23:00:26,745 INFO L109 eAbstractionObserver]: Analyzing ICFG s12iff.c [2020-08-22 23:00:26,757 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:00:26,765 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:00:26,781 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:00:26,804 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:00:26,804 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:00:26,804 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:00:26,805 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:00:26,805 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:00:26,805 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:00:26,805 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:00:26,806 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:00:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-08-22 23:00:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:26,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:26,839 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 23:00:26,840 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:26,847 INFO L82 PathProgramCache]: Analyzing trace with hash 350973390, now seen corresponding path program 1 times [2020-08-22 23:00:26,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:26,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019162137] [2020-08-22 23:00:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:26,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,081 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 23:00:27,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019162137] [2020-08-22 23:00:27,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:27,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:00:27,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25032904] [2020-08-22 23:00:27,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:00:27,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:00:27,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:00:27,111 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 3 states. [2020-08-22 23:00:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:27,397 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2020-08-22 23:00:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:00:27,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 23:00:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:27,410 INFO L225 Difference]: With dead ends: 143 [2020-08-22 23:00:27,410 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 23:00:27,415 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 23:00:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 23:00:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-08-22 23:00:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 23:00:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-08-22 23:00:27,472 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 33 [2020-08-22 23:00:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:27,473 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-08-22 23:00:27,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:00:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-08-22 23:00:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:27,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:27,476 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 23:00:27,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:00:27,476 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:27,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1688115303, now seen corresponding path program 1 times [2020-08-22 23:00:27,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:27,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332653224] [2020-08-22 23:00:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:27,637 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 23:00:27,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332653224] [2020-08-22 23:00:27,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:27,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:00:27,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603044018] [2020-08-22 23:00:27,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:00:27,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:27,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:00:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:00:27,642 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 5 states. [2020-08-22 23:00:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:27,931 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-08-22 23:00:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:00:27,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-22 23:00:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:27,934 INFO L225 Difference]: With dead ends: 142 [2020-08-22 23:00:27,934 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 23:00:27,936 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 23:00:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 23:00:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-08-22 23:00:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 23:00:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-08-22 23:00:27,953 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 33 [2020-08-22 23:00:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:27,954 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-08-22 23:00:27,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:00:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-08-22 23:00:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 23:00:27,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:27,957 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, 1, 1, 1] [2020-08-22 23:00:27,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:00:27,957 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:27,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:27,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1790069826, now seen corresponding path program 1 times [2020-08-22 23:00:27,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:27,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997229621] [2020-08-22 23:00:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:00:28,007 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:00:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:00:28,054 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:00:28,093 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:00:28,093 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:00:28,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:00:28,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:00:28 BoogieIcfgContainer [2020-08-22 23:00:28,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:00:28,201 INFO L168 Benchmark]: Toolchain (without parser) took 2320.81 ms. Allocated memory was 138.4 MB in the beginning and 233.8 MB in the end (delta: 95.4 MB). Free memory was 102.1 MB in the beginning and 186.2 MB in the end (delta: -84.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:28,202 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:00:28,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.26 ms. Allocated memory is still 138.4 MB. Free memory was 101.9 MB in the beginning and 91.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:28,204 INFO L168 Benchmark]: Boogie Preprocessor took 138.43 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 178.7 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:28,205 INFO L168 Benchmark]: RCFGBuilder took 437.76 ms. Allocated memory is still 201.9 MB. Free memory was 178.7 MB in the beginning and 156.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:28,206 INFO L168 Benchmark]: TraceAbstraction took 1459.85 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 156.7 MB in the beginning and 186.2 MB in the end (delta: -29.6 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:28,211 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.26 ms. Allocated memory is still 138.4 MB. Free memory was 101.9 MB in the beginning and 91.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.43 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 178.7 MB in the end (delta: -87.4 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 437.76 ms. Allocated memory is still 201.9 MB. Free memory was 178.7 MB in the beginning and 156.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1459.85 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 156.7 MB in the beginning and 186.2 MB in the end (delta: -29.6 MB). Peak memory consumption was 2.4 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)=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] = 1 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