/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/res2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:06,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:06,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:06,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:06,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:06,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:06,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:06,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:06,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:06,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:06,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:06,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:06,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:06,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:06,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:06,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:06,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:06,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:06,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:06,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:06,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:06,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:06,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:06,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:06,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:06,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:06,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:06,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:06,601 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 11:47:06,631 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:06,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:06,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:06,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:06,633 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:06,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:06,633 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:06,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:06,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:06,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:06,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:06,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:06,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:06,636 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:06,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:06,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:06,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:06,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:06,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:06,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:06,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:06,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:06,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:06,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:06,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:06,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:06,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:06,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:06,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:06,639 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 11:47:06,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:07,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:07,017 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:07,019 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:07,020 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:07,020 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2f.c [2020-07-20 11:47:07,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4b9397c/c6208d88b25b44df8175ea05c96d495a/FLAG888df887a [2020-07-20 11:47:07,633 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:07,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2f.c [2020-07-20 11:47:07,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4b9397c/c6208d88b25b44df8175ea05c96d495a/FLAG888df887a [2020-07-20 11:47:07,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4b9397c/c6208d88b25b44df8175ea05c96d495a [2020-07-20 11:47:07,984 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:07,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:07,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:07,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:07,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:07,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:07" (1/1) ... [2020-07-20 11:47:08,000 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b386b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:07, skipping insertion in model container [2020-07-20 11:47:08,000 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:07" (1/1) ... [2020-07-20 11:47:08,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:08,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:08,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:08,285 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:08,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:08,326 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:08,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08 WrapperNode [2020-07-20 11:47:08,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:08,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:08,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:08,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:08,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (1/1) ... [2020-07-20 11:47:08,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:08,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:08,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:08,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:08,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (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 11:47:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:08,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:08,931 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:08,931 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-20 11:47:08,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:08 BoogieIcfgContainer [2020-07-20 11:47:08,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:08,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:08,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:08,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:08,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:07" (1/3) ... [2020-07-20 11:47:08,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3c848f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:08, skipping insertion in model container [2020-07-20 11:47:08,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:08" (2/3) ... [2020-07-20 11:47:08,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3c848f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:08, skipping insertion in model container [2020-07-20 11:47:08,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:08" (3/3) ... [2020-07-20 11:47:08,946 INFO L109 eAbstractionObserver]: Analyzing ICFG res2f.c [2020-07-20 11:47:08,957 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:08,966 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:08,982 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:09,008 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:09,008 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:09,008 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:09,009 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:09,009 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:09,009 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:09,009 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:09,010 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:09,029 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-20 11:47:09,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 11:47:09,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:09,037 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] [2020-07-20 11:47:09,037 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:09,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-07-20 11:47:09,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:09,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077267618] [2020-07-20 11:47:09,052 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 11:47:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:09,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:09,198 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 11:47:09,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:09,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077267618] [2020-07-20 11:47:09,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:09,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:09,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680823420] [2020-07-20 11:47:09,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:09,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:09,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:09,235 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-20 11:47:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:09,266 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-07-20 11:47:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:09,268 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-07-20 11:47:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:09,277 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:47:09,278 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 11:47:09,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 11:47:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 11:47:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 11:47:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:47:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-20 11:47:09,333 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 29 [2020-07-20 11:47:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:09,334 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-20 11:47:09,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-20 11:47:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 11:47:09,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:09,336 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] [2020-07-20 11:47:09,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:09,554 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash 120259143, now seen corresponding path program 1 times [2020-07-20 11:47:09,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:09,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8823261] [2020-07-20 11:47:09,556 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 11:47:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:09,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:09,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:09,735 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 11:47:09,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:09,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8823261] [2020-07-20 11:47:09,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:09,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:09,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887694796] [2020-07-20 11:47:09,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:09,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:09,741 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2020-07-20 11:47:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:09,863 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-07-20 11:47:09,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:09,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-07-20 11:47:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:09,865 INFO L225 Difference]: With dead ends: 69 [2020-07-20 11:47:09,866 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:47:09,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 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 11:47:09,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:47:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-07-20 11:47:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 11:47:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-20 11:47:09,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-07-20 11:47:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:09,879 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-20 11:47:09,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-20 11:47:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 11:47:09,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:09,881 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] [2020-07-20 11:47:10,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:10,097 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-07-20 11:47:10,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:10,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374306003] [2020-07-20 11:47:10,099 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 11:47:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:10,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:10,217 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:10,277 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:10,277 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:10,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:10,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:10 BoogieIcfgContainer [2020-07-20 11:47:10,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:10,596 INFO L168 Benchmark]: Toolchain (without parser) took 2608.67 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 104.1 MB in the beginning and 201.1 MB in the end (delta: -96.9 MB). Peak memory consumption was 83.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:10,598 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:10,600 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.36 ms. Allocated memory is still 139.5 MB. Free memory was 103.7 MB in the beginning and 92.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:10,603 INFO L168 Benchmark]: Boogie Preprocessor took 131.62 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.9 MB in the beginning and 180.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:10,604 INFO L168 Benchmark]: RCFGBuilder took 476.50 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 159.5 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:10,610 INFO L168 Benchmark]: TraceAbstraction took 1655.20 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 159.5 MB in the beginning and 201.1 MB in the end (delta: -41.5 MB). Peak memory consumption was 75.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:10,616 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.36 ms. Allocated memory is still 139.5 MB. Free memory was 103.7 MB in the beginning and 92.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.62 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.9 MB in the beginning and 180.4 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 476.50 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 159.5 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1655.20 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 159.5 MB in the beginning and 201.1 MB in the end (delta: -41.5 MB). Peak memory consumption was 75.1 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)=6, 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); [L28] int *b = malloc(sizeof(int)*N); [L29] int *c = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [\old(N)=0, a={-3:0}, b={-2:0}, c={-1:0}, i=0, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(int)*N)={-1:0}, malloc(sizeof(int)*N)={-3:0}, N=1, sum={2:0}] [L32] COND TRUE i