/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s5iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:27,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:27,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:27,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:27,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:27,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:27,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:27,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:27,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:27,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:27,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:27,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:27,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:27,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:27,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:27,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:27,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:27,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:27,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:27,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:27,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:27,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:27,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:27,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:27,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:27,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:27,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:27,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:27,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:47:27,602 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:27,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:27,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:27,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:27,604 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:27,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:27,604 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:27,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:27,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:27,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:27,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:27,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:27,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:27,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:27,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:27,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:27,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:27,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:27,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:27,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:27,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:27,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:27,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:27,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:27,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:27,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:27,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:27,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:27,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:27,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:47:27,922 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:27,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:27,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:27,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:27,942 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:27,943 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s5iff.c [2020-07-20 11:47:28,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2634405b/739531b3f35e41f6a52e563fabd639df/FLAG829249c1a [2020-07-20 11:47:28,505 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:28,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s5iff.c [2020-07-20 11:47:28,512 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2634405b/739531b3f35e41f6a52e563fabd639df/FLAG829249c1a [2020-07-20 11:47:28,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2634405b/739531b3f35e41f6a52e563fabd639df [2020-07-20 11:47:28,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:28,933 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:28,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:28,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:28,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:28,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:28" (1/1) ... [2020-07-20 11:47:28,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b30020e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:28, skipping insertion in model container [2020-07-20 11:47:28,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:28" (1/1) ... [2020-07-20 11:47:28,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:28,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:29,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:29,166 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:29,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:29,204 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:29,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29 WrapperNode [2020-07-20 11:47:29,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:29,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:29,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:29,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:29,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (1/1) ... [2020-07-20 11:47:29,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (1/1) ... [2020-07-20 11:47:29,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (1/1) ... [2020-07-20 11:47:29,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (1/1) ... [2020-07-20 11:47:29,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (1/1) ... [2020-07-20 11:47:29,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (1/1) ... [2020-07-20 11:47:29,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (1/1) ... [2020-07-20 11:47:29,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:29,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:29,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:29,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:29,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (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 [2020-07-20 11:47:29,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:29,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:29,395 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:29,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:29,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:29,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:29,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:29,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:29,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:29,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:29,693 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:29,693 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 11:47:29,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:29 BoogieIcfgContainer [2020-07-20 11:47:29,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:29,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:29,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:29,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:29,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:28" (1/3) ... [2020-07-20 11:47:29,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342f8066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:29, skipping insertion in model container [2020-07-20 11:47:29,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:29" (2/3) ... [2020-07-20 11:47:29,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342f8066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:29, skipping insertion in model container [2020-07-20 11:47:29,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:29" (3/3) ... [2020-07-20 11:47:29,721 INFO L109 eAbstractionObserver]: Analyzing ICFG s5iff.c [2020-07-20 11:47:29,731 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:29,737 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:29,750 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:29,770 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:29,770 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:29,770 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:29,771 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:29,771 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:29,771 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:29,771 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:29,771 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 11:47:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:47:29,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:29,792 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] [2020-07-20 11:47:29,793 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:29,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:29,798 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 11:47:29,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:29,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528450276] [2020-07-20 11:47:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:29,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:29,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:29,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528450276] [2020-07-20 11:47:29,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:29,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:29,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571037658] [2020-07-20 11:47:29,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:29,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:29,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:29,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:29,981 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-20 11:47:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:30,003 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-20 11:47:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:30,005 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 11:47:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:30,012 INFO L225 Difference]: With dead ends: 54 [2020-07-20 11:47:30,012 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 11:47:30,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 11:47:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 11:47:30,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 11:47:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 11:47:30,055 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-20 11:47:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:30,056 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 11:47:30,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 11:47:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:47:30,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:30,058 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] [2020-07-20 11:47:30,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:30,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-20 11:47:30,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:30,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498631234] [2020-07-20 11:47:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:30,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:30,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:30,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498631234] [2020-07-20 11:47:30,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:30,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:30,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296729431] [2020-07-20 11:47:30,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:30,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:30,393 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-20 11:47:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:30,462 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 11:47:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:30,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 11:47:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:30,464 INFO L225 Difference]: With dead ends: 40 [2020-07-20 11:47:30,465 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:47:30,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:47:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 11:47:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 11:47:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 11:47:30,474 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 11:47:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:30,474 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 11:47:30,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 11:47:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:47:30,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:30,476 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] [2020-07-20 11:47:30,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:30,692 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:30,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 11:47:30,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:30,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237330144] [2020-07-20 11:47:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:30,757 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:30,779 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:30,804 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:30,804 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:31,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:31,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:31 BoogieIcfgContainer [2020-07-20 11:47:31,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:31,061 INFO L168 Benchmark]: Toolchain (without parser) took 2126.90 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 102.2 MB in the beginning and 104.9 MB in the end (delta: -2.7 MB). Peak memory consumption was 60.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:31,062 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:47:31,063 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.27 ms. Allocated memory is still 137.4 MB. Free memory was 101.8 MB in the beginning and 91.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:31,064 INFO L168 Benchmark]: Boogie Preprocessor took 121.41 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 178.1 MB in the end (delta: -87.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:31,065 INFO L168 Benchmark]: RCFGBuilder took 369.50 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 161.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:31,066 INFO L168 Benchmark]: TraceAbstraction took 1352.95 ms. Allocated memory is still 200.8 MB. Free memory was 160.7 MB in the beginning and 104.9 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:31,070 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 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.27 ms. Allocated memory is still 137.4 MB. Free memory was 101.8 MB in the beginning and 91.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.41 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 178.1 MB in the end (delta: -87.0 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.50 ms. Allocated memory is still 200.8 MB. Free memory was 178.1 MB in the beginning and 161.7 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1352.95 ms. Allocated memory is still 200.8 MB. Free memory was 160.7 MB in the beginning and 104.9 MB in the end (delta: 55.8 MB). Peak memory consumption was 55.8 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)=7, N=0] [L21] N = __VERIFIER_nondet_int() [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; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [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