/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/sina3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:33,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:33,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:33,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:33,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:33,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:33,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:33,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:33,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:33,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:33,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:33,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:33,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:33,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:33,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:33,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:33,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:33,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:33,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:33,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:33,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:33,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:33,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:33,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:33,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:33,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:33,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:33,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:33,175 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 11:47:33,196 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:33,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:33,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:33,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:33,199 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:33,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:33,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:33,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:33,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:33,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:33,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:33,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:33,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:33,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:33,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:33,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:33,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:33,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:33,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:33,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:33,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:33,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:33,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:33,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:33,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:33,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:33,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:33,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:33,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:33,204 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 11:47:33,490 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:33,502 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:33,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:33,507 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:33,507 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:33,508 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina3f.c [2020-07-20 11:47:33,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e85fee34/5a25bb0d303b4936921fcce6bb6e62ce/FLAG6765cbfd2 [2020-07-20 11:47:34,023 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:34,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sina3f.c [2020-07-20 11:47:34,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e85fee34/5a25bb0d303b4936921fcce6bb6e62ce/FLAG6765cbfd2 [2020-07-20 11:47:34,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e85fee34/5a25bb0d303b4936921fcce6bb6e62ce [2020-07-20 11:47:34,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:34,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:34,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:34,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:34,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:34,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68fe31e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34, skipping insertion in model container [2020-07-20 11:47:34,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:34,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:34,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:34,637 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:34,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:34,773 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:34,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34 WrapperNode [2020-07-20 11:47:34,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:34,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:34,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:34,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:34,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (1/1) ... [2020-07-20 11:47:34,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:34,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:34,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:34,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:34,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (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 11:47:34,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:34,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:35,162 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:35,163 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-20 11:47:35,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:35 BoogieIcfgContainer [2020-07-20 11:47:35,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:35,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:35,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:35,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:35,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:34" (1/3) ... [2020-07-20 11:47:35,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5515ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:35, skipping insertion in model container [2020-07-20 11:47:35,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:34" (2/3) ... [2020-07-20 11:47:35,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5515ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:35, skipping insertion in model container [2020-07-20 11:47:35,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:35" (3/3) ... [2020-07-20 11:47:35,176 INFO L109 eAbstractionObserver]: Analyzing ICFG sina3f.c [2020-07-20 11:47:35,189 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:35,208 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:35,248 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:35,279 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:35,279 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:35,280 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:35,280 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:35,280 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:35,280 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:35,280 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:35,280 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 11:47:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:47:35,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:35,312 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 11:47:35,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash -173101897, now seen corresponding path program 1 times [2020-07-20 11:47:35,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:35,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156727616] [2020-07-20 11:47:35,325 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 11:47:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:35,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:35,449 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 11:47:35,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:35,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156727616] [2020-07-20 11:47:35,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:35,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:35,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950631490] [2020-07-20 11:47:35,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:35,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:35,476 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-07-20 11:47:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:35,504 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2020-07-20 11:47:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:35,506 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-07-20 11:47:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:35,515 INFO L225 Difference]: With dead ends: 70 [2020-07-20 11:47:35,515 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 11:47:35,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 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 11:47:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 11:47:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 11:47:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:47:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 11:47:35,556 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-07-20 11:47:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:35,557 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 11:47:35,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 11:47:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:47:35,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:35,558 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 11:47:35,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:35,765 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:35,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1503462707, now seen corresponding path program 1 times [2020-07-20 11:47:35,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:35,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132219768] [2020-07-20 11:47:35,768 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 11:47:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:35,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:35,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:35,917 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 11:47:35,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:35,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132219768] [2020-07-20 11:47:35,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:35,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:35,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208918203] [2020-07-20 11:47:35,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:35,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:35,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:35,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:35,925 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-07-20 11:47:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:36,033 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-07-20 11:47:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:36,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-07-20 11:47:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:36,037 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:47:36,037 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:47:36,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 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 11:47:36,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:47:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-07-20 11:47:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 11:47:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-20 11:47:36,054 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 26 [2020-07-20 11:47:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:36,054 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-20 11:47:36,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-20 11:47:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 11:47:36,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:36,056 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] [2020-07-20 11:47:36,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:36,271 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash -260192085, now seen corresponding path program 1 times [2020-07-20 11:47:36,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:36,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319347181] [2020-07-20 11:47:36,274 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 11:47:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:36,333 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:36,357 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:36,390 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:36,391 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:36,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:36,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:36 BoogieIcfgContainer [2020-07-20 11:47:36,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:36,655 INFO L168 Benchmark]: Toolchain (without parser) took 2248.52 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 103.2 MB in the beginning and 94.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:36,656 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.9 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:36,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.67 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.7 MB in the beginning and 182.5 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:36,658 INFO L168 Benchmark]: Boogie Preprocessor took 40.77 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 180.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:36,659 INFO L168 Benchmark]: RCFGBuilder took 350.96 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 160.5 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:36,661 INFO L168 Benchmark]: TraceAbstraction took 1483.94 ms. Allocated memory is still 203.4 MB. Free memory was 159.8 MB in the beginning and 94.3 MB in the end (delta: 65.5 MB). Peak memory consumption was 65.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:36,665 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 138.9 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 364.67 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 102.7 MB in the beginning and 182.5 MB in the end (delta: -79.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.77 ms. Allocated memory is still 203.4 MB. Free memory was 182.5 MB in the beginning and 180.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 350.96 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 160.5 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1483.94 ms. Allocated memory is still 203.4 MB. Free memory was 159.8 MB in the beginning and 94.3 MB in the end (delta: 65.5 MB). Peak memory consumption was 65.5 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] long long *a = malloc(sizeof(long long)*N); [L28] int *b = malloc(sizeof(int)*N); [L30] sum[0] = 1 [L31] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=0, malloc(sizeof(int)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=1, sum={2:0}] [L31] COND TRUE i