/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/brs1f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:45:34,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:45:34,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:45:34,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:45:34,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:45:34,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:45:34,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:45:34,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:45:34,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:45:34,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:45:34,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:45:34,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:45:34,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:45:34,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:45:34,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:45:34,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:45:34,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:45:34,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:45:34,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:45:34,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:45:34,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:45:34,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:45:34,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:45:34,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:45:34,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:45:34,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:45:34,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:45:34,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:45:34,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:45:34,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:45:34,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:45:34,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:45:34,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:45:34,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:45:34,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:45:34,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:45:34,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:45:34,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:45:34,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:45:34,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:45:34,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:45:34,848 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 11:45:34,886 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:45:34,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:45:34,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:45:34,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:45:34,891 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:45:34,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:45:34,892 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:45:34,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:45:34,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:45:34,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:45:34,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:45:34,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:45:34,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:45:34,893 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:45:34,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:45:34,894 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:45:34,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:45:34,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:45:34,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:45:34,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:45:34,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:45:34,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:45:34,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:45:34,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:45:34,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:45:34,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:45:34,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:34,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:45:34,897 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:45:34,897 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 11:45:35,224 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:45:35,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:45:35,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:45:35,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:45:35,247 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:45:35,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1f.c [2020-07-20 11:45:35,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b319917ae/ecd7ed695ec145b38bdc7777aad4e1ce/FLAGba65df11a [2020-07-20 11:45:35,778 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:45:35,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1f.c [2020-07-20 11:45:35,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b319917ae/ecd7ed695ec145b38bdc7777aad4e1ce/FLAGba65df11a [2020-07-20 11:45:36,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b319917ae/ecd7ed695ec145b38bdc7777aad4e1ce [2020-07-20 11:45:36,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:45:36,173 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:45:36,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:45:36,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:45:36,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:45:36,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561ec46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36, skipping insertion in model container [2020-07-20 11:45:36,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:45:36,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:45:36,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:45:36,428 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:45:36,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:45:36,467 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:45:36,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36 WrapperNode [2020-07-20 11:45:36,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:45:36,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:45:36,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:45:36,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:45:36,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (1/1) ... [2020-07-20 11:45:36,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:45:36,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:45:36,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:45:36,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:45:36,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (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 11:45:36,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:45:36,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:45:36,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:45:36,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:45:36,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:45:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:45:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:45:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:45:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:45:36,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:45:36,650 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:45:36,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:45:36,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:45:36,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:45:36,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:45:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:45:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:45:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:45:36,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:45:36,916 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:45:36,917 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 11:45:36,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:45:36 BoogieIcfgContainer [2020-07-20 11:45:36,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:45:36,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:45:36,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:45:36,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:45:36,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:45:36" (1/3) ... [2020-07-20 11:45:36,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f12bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:45:36, skipping insertion in model container [2020-07-20 11:45:36,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:36" (2/3) ... [2020-07-20 11:45:36,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f12bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:45:36, skipping insertion in model container [2020-07-20 11:45:36,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:45:36" (3/3) ... [2020-07-20 11:45:36,935 INFO L109 eAbstractionObserver]: Analyzing ICFG brs1f.c [2020-07-20 11:45:36,946 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:45:36,955 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:45:36,973 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:45:37,004 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:45:37,005 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:45:37,005 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:45:37,005 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:45:37,005 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:45:37,005 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:45:37,006 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:45:37,006 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:45:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 11:45:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:45:37,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:37,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:45:37,035 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:37,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:37,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-20 11:45:37,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:37,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904467968] [2020-07-20 11:45:37,052 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 11:45:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:45:37,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:37,256 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 11:45:37,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:37,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904467968] [2020-07-20 11:45:37,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:37,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:45:37,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008284719] [2020-07-20 11:45:37,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:45:37,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:45:37,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:45:37,292 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-20 11:45:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:37,331 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-20 11:45:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:45:37,333 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 11:45:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:37,341 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:45:37,342 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 11:45:37,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:45:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 11:45:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 11:45:37,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 11:45:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-07-20 11:45:37,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-07-20 11:45:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:37,387 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-07-20 11:45:37,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:45:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-07-20 11:45:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 11:45:37,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:37,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:45:37,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:37,605 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:37,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-20 11:45:37,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:37,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637035831] [2020-07-20 11:45:37,609 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 11:45:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:45:37,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:45:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:45:37,703 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 11:45:37,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:45:37,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637035831] [2020-07-20 11:45:37,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:45:37,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:45:37,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815505108] [2020-07-20 11:45:37,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:45:37,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:45:37,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:45:37,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:45:37,707 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2020-07-20 11:45:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:45:37,784 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-07-20 11:45:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:45:37,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 11:45:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:45:37,786 INFO L225 Difference]: With dead ends: 42 [2020-07-20 11:45:37,786 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:45:37,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:45:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:45:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-20 11:45:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 11:45:37,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-20 11:45:37,795 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-07-20 11:45:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:45:37,796 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-20 11:45:37,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:45:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-20 11:45:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:45:37,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:45:37,798 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] [2020-07-20 11:45:38,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:38,012 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:45:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:45:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-20 11:45:38,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:45:38,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954783516] [2020-07-20 11:45:38,014 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 11:45:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:45:38,061 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:45:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:45:38,078 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:45:38,102 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:45:38,102 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:45:38,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:38,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:45:38 BoogieIcfgContainer [2020-07-20 11:45:38,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:45:38,359 INFO L168 Benchmark]: Toolchain (without parser) took 2186.71 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 101.4 MB in the beginning and 104.6 MB in the end (delta: -3.2 MB). Peak memory consumption was 58.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,360 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.45 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 90.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,362 INFO L168 Benchmark]: Boogie Preprocessor took 117.85 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 90.6 MB in the beginning and 177.2 MB in the end (delta: -86.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,363 INFO L168 Benchmark]: RCFGBuilder took 337.26 ms. Allocated memory is still 199.8 MB. Free memory was 177.2 MB in the beginning and 160.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,364 INFO L168 Benchmark]: TraceAbstraction took 1430.96 ms. Allocated memory is still 199.8 MB. Free memory was 160.2 MB in the beginning and 104.6 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:45:38,370 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.45 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 90.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.85 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 90.6 MB in the beginning and 177.2 MB in the end (delta: -86.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.26 ms. Allocated memory is still 199.8 MB. Free memory was 177.2 MB in the beginning and 160.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1430.96 ms. Allocated memory is still 199.8 MB. Free memory was 160.2 MB in the beginning and 104.6 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 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)=3, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 VAL [\old(N)=0, a={21239:0}, i=0, malloc(sizeof(int)*N)={21239:0}, N=1, sum={21241:0}] [L29] COND TRUE i