/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/sina1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:29,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:29,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:29,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:29,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:29,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:29,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:29,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:29,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:29,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:29,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:29,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:29,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:29,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:29,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:29,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:29,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:29,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:29,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:29,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:29,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:29,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:29,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:29,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:29,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:29,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:29,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:29,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:29,970 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 11:47:29,991 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:29,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:29,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:29,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:29,994 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:29,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:29,995 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:29,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:29,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:29,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:29,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:29,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:29,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:29,996 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:29,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:29,996 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:29,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:29,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:29,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:29,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:29,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:29,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:29,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:29,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:29,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:29,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:29,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:29,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:29,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:29,999 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 11:47:30,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:30,307 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:30,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:30,313 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:30,313 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:30,314 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina1f.c [2020-07-20 11:47:30,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874239fea/3dd198e15d7442b59250cda006d6b8ae/FLAG3a4ece3fc [2020-07-20 11:47:30,992 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:30,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sina1f.c [2020-07-20 11:47:31,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874239fea/3dd198e15d7442b59250cda006d6b8ae/FLAG3a4ece3fc [2020-07-20 11:47:31,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874239fea/3dd198e15d7442b59250cda006d6b8ae [2020-07-20 11:47:31,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:31,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:31,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:31,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:31,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:31,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50f9b2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31, skipping insertion in model container [2020-07-20 11:47:31,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:31,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:31,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:31,578 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:31,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:31,623 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:31,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31 WrapperNode [2020-07-20 11:47:31,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:31,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:31,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:31,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:31,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (1/1) ... [2020-07-20 11:47:31,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:31,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:31,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:31,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:31,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (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 11:47:31,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:31,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:31,848 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:31,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:31,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:31,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:47:31,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:47:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:47:31,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:47:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:47:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:47:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:31,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:32,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:32,227 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 11:47:32,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:32 BoogieIcfgContainer [2020-07-20 11:47:32,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:32,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:32,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:32,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:32,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:31" (1/3) ... [2020-07-20 11:47:32,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4373483a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:32, skipping insertion in model container [2020-07-20 11:47:32,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:31" (2/3) ... [2020-07-20 11:47:32,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4373483a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:32, skipping insertion in model container [2020-07-20 11:47:32,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:32" (3/3) ... [2020-07-20 11:47:32,243 INFO L109 eAbstractionObserver]: Analyzing ICFG sina1f.c [2020-07-20 11:47:32,252 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:32,259 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:32,273 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:32,300 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:32,300 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:32,300 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:32,301 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:32,301 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:32,301 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:32,301 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:32,301 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 11:47:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:47:32,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:32,327 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] [2020-07-20 11:47:32,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:32,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-20 11:47:32,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:32,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272542193] [2020-07-20 11:47:32,343 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 11:47:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:32,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:32,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:32,478 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 11:47:32,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:32,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272542193] [2020-07-20 11:47:32,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:32,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:32,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718090484] [2020-07-20 11:47:32,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:32,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:32,511 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-20 11:47:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:32,540 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-20 11:47:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:32,541 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 11:47:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:32,552 INFO L225 Difference]: With dead ends: 58 [2020-07-20 11:47:32,552 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 11:47:32,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 11:47:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 11:47:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 11:47:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 11:47:32,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-20 11:47:32,609 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-20 11:47:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:32,610 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-20 11:47:32,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:32,611 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-20 11:47:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:47:32,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:32,612 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] [2020-07-20 11:47:32,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:32,829 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:32,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-20 11:47:32,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:32,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842264683] [2020-07-20 11:47:32,832 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 11:47:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:47:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:32,956 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 11:47:32,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:32,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842264683] [2020-07-20 11:47:32,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:32,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:47:32,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277284258] [2020-07-20 11:47:32,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:47:32,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:32,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:47:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:47:32,967 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-07-20 11:47:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:33,056 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-07-20 11:47:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:47:33,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-20 11:47:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:33,061 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:47:33,062 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:47:33,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 11:47:33,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:47:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-07-20 11:47:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:47:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-07-20 11:47:33,079 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-07-20 11:47:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:33,080 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-07-20 11:47:33,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:47:33,080 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-07-20 11:47:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:47:33,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:33,081 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 11:47:33,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:33,297 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-07-20 11:47:33,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:33,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521444516] [2020-07-20 11:47:33,300 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 11:47:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:33,351 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:47:33,371 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:47:33,400 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:47:33,401 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:47:33,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:33,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:33 BoogieIcfgContainer [2020-07-20 11:47:33,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:33,663 INFO L168 Benchmark]: Toolchain (without parser) took 2338.88 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 103.4 MB in the beginning and 106.2 MB in the end (delta: -2.8 MB). Peak memory consumption was 61.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:33,664 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:33,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.50 ms. Allocated memory is still 138.4 MB. Free memory was 103.0 MB in the beginning and 92.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:33,666 INFO L168 Benchmark]: Boogie Preprocessor took 136.99 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 181.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:33,667 INFO L168 Benchmark]: RCFGBuilder took 470.10 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 163.8 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:33,668 INFO L168 Benchmark]: TraceAbstraction took 1425.57 ms. Allocated memory is still 202.9 MB. Free memory was 163.8 MB in the beginning and 106.2 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:33,673 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 299.50 ms. Allocated memory is still 138.4 MB. Free memory was 103.0 MB in the beginning and 92.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.99 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 92.6 MB in the beginning and 181.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 470.10 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 163.8 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1425.57 ms. Allocated memory is still 202.9 MB. Free memory was 163.8 MB in the beginning and 106.2 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 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)=5, 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] int 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