/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/s5iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:05:04,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:05:04,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:05:04,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:05:04,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:05:04,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:05:04,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:05:04,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:05:04,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:05:04,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:05:04,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:05:04,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:05:04,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:05:04,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:05:04,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:05:04,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:05:04,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:05:04,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:05:04,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:05:04,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:05:04,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:05:04,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:05:04,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:05:04,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:05:04,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:05:04,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:05:04,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:05:04,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:05:04,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:05:04,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:05:04,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:05:04,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:05:04,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:05:04,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:05:04,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:05:04,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:05:04,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:05:04,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:05:04,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:05:04,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:05:04,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:05:04,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:05:04,437 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:05:04,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:05:04,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:05:04,440 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:05:04,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:05:04,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:05:04,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:05:04,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:05:04,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:05:04,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:05:04,442 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:05:04,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:05:04,443 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:05:04,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:05:04,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:05:04,444 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:05:04,444 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:05:04,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:05:04,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:05:04,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:05:04,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:05:04,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:05:04,446 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 [2020-07-17 18:05:04,711 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:05:04,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:05:04,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:05:04,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:05:04,729 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:05:04,729 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s5iff.c [2020-07-17 18:05:04,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a4e3bf8/e2962d6acadf4c7eb5fab0f271fc47a8/FLAG620bf4514 [2020-07-17 18:05:05,242 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:05:05,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s5iff.c [2020-07-17 18:05:05,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a4e3bf8/e2962d6acadf4c7eb5fab0f271fc47a8/FLAG620bf4514 [2020-07-17 18:05:05,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82a4e3bf8/e2962d6acadf4c7eb5fab0f271fc47a8 [2020-07-17 18:05:05,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:05:05,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:05:05,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:05:05,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:05:05,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:05:05,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:05:05" (1/1) ... [2020-07-17 18:05:05,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579be97d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:05, skipping insertion in model container [2020-07-17 18:05:05,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:05:05" (1/1) ... [2020-07-17 18:05:05,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:05:05,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:05:05,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:05:05,888 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:05:05,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:05:06,019 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:05:06,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06 WrapperNode [2020-07-17 18:05:06,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:05:06,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:05:06,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:05:06,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:05:06,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (1/1) ... [2020-07-17 18:05:06,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (1/1) ... [2020-07-17 18:05:06,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (1/1) ... [2020-07-17 18:05:06,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (1/1) ... [2020-07-17 18:05:06,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (1/1) ... [2020-07-17 18:05:06,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (1/1) ... [2020-07-17 18:05:06,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (1/1) ... [2020-07-17 18:05:06,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:05:06,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:05:06,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:05:06,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:05:06,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (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 [2020-07-17 18:05:06,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:05:06,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:05:06,127 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:05:06,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:05:06,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:05:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:05:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:05:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:05:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:05:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:05:06,128 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 18:05:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:05:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:05:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 18:05:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 18:05:06,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 18:05:06,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:05:06,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:05:06,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:05:06,402 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:05:06,402 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 18:05:06,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:05:06 BoogieIcfgContainer [2020-07-17 18:05:06,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:05:06,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:05:06,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:05:06,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:05:06,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:05:05" (1/3) ... [2020-07-17 18:05:06,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db205b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:05:06, skipping insertion in model container [2020-07-17 18:05:06,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:05:06" (2/3) ... [2020-07-17 18:05:06,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db205b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:05:06, skipping insertion in model container [2020-07-17 18:05:06,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:05:06" (3/3) ... [2020-07-17 18:05:06,421 INFO L109 eAbstractionObserver]: Analyzing ICFG s5iff.c [2020-07-17 18:05:06,436 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:05:06,445 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:05:06,463 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:05:06,489 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:05:06,490 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:05:06,490 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:05:06,490 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:05:06,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:05:06,491 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:05:06,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:05:06,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:05:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-07-17 18:05:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 18:05:06,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:06,532 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] [2020-07-17 18:05:06,533 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:06,559 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times [2020-07-17 18:05:06,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:06,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444726587] [2020-07-17 18:05:06,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:05:06,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444726587] [2020-07-17 18:05:06,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:05:06,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:05:06,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33337951] [2020-07-17 18:05:06,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:05:06,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:06,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:05:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:05:06,832 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-07-17 18:05:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:07,031 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2020-07-17 18:05:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:05:07,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-17 18:05:07,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:07,044 INFO L225 Difference]: With dead ends: 113 [2020-07-17 18:05:07,045 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 18:05:07,051 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 [2020-07-17 18:05:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 18:05:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-17 18:05:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-17 18:05:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-07-17 18:05:07,104 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31 [2020-07-17 18:05:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:07,104 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-07-17 18:05:07,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:05:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-07-17 18:05:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 18:05:07,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:07,107 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] [2020-07-17 18:05:07,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:05:07,108 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times [2020-07-17 18:05:07,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:07,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708606070] [2020-07-17 18:05:07,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:05:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:05:07,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708606070] [2020-07-17 18:05:07,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:05:07,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 18:05:07,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017054095] [2020-07-17 18:05:07,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:05:07,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:05:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:05:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:05:07,278 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states. [2020-07-17 18:05:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:05:07,479 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-07-17 18:05:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 18:05:07,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-07-17 18:05:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:05:07,482 INFO L225 Difference]: With dead ends: 99 [2020-07-17 18:05:07,483 INFO L226 Difference]: Without dead ends: 74 [2020-07-17 18:05:07,484 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 [2020-07-17 18:05:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-17 18:05:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-07-17 18:05:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 18:05:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-07-17 18:05:07,501 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31 [2020-07-17 18:05:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:05:07,501 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-07-17 18:05:07,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:05:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-07-17 18:05:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 18:05:07,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:05:07,504 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] [2020-07-17 18:05:07,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:05:07,504 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:05:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:05:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times [2020-07-17 18:05:07,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:05:07,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835709891] [2020-07-17 18:05:07,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:05:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:05:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 18:05:07,654 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 18:05:07,654 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:05:07,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:05:07,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:05:07 BoogieIcfgContainer [2020-07-17 18:05:07,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:05:07,708 INFO L168 Benchmark]: Toolchain (without parser) took 2050.52 ms. Allocated memory was 139.5 MB in the beginning and 234.9 MB in the end (delta: 95.4 MB). Free memory was 103.8 MB in the beginning and 200.5 MB in the end (delta: -96.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 18:05:07,709 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 18:05:07,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.43 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 103.4 MB in the beginning and 183.4 MB in the end (delta: -80.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-17 18:05:07,711 INFO L168 Benchmark]: Boogie Preprocessor took 45.76 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:05:07,712 INFO L168 Benchmark]: RCFGBuilder took 343.11 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 162.2 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:05:07,713 INFO L168 Benchmark]: TraceAbstraction took 1293.55 ms. Allocated memory was 204.5 MB in the beginning and 234.9 MB in the end (delta: 30.4 MB). Free memory was 161.5 MB in the beginning and 200.5 MB in the end (delta: -38.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 18:05:07,717 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 139.5 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 360.43 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 103.4 MB in the beginning and 183.4 MB in the end (delta: -80.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 45.76 ms. Allocated memory is still 204.5 MB. Free memory was 183.4 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.11 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 162.2 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1293.55 ms. Allocated memory was 204.5 MB in the beginning and 234.9 MB in the end (delta: 30.4 MB). Free memory was 161.5 MB in the beginning and 200.5 MB in the end (delta: -38.9 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={2:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] sum[0] = 1 VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i