/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/ssinaf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:39:17,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:39:17,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:39:17,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:39:17,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:39:17,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:39:17,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:39:17,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:39:17,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:39:17,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:39:17,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:39:17,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:39:17,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:39:17,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:39:17,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:39:17,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:39:17,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:39:17,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:39:17,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:39:17,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:39:17,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:39:17,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:39:17,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:39:17,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:39:17,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:39:17,391 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:39:17,391 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:39:17,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:39:17,394 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:39:17,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:39:17,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:39:17,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:39:17,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:39:17,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:39:17,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:39:17,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:39:17,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:39:17,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:39:17,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:39:17,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:39:17,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:39:17,406 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 [2020-07-21 11:39:17,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:39:17,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:39:17,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:39:17,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:39:17,433 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:39:17,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:39:17,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:39:17,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:39:17,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:39:17,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:39:17,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:39:17,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:39:17,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:39:17,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:39:17,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:39:17,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:39:17,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:39:17,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:39:17,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:39:17,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:39:17,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:39:17,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:39:17,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:39:17,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:39:17,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:39:17,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:39:17,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:17,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:39:17,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:39:17,439 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 [2020-07-21 11:39:17,798 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:39:17,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:39:17,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:39:17,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:39:17,818 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:39:17,818 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ssinaf.c [2020-07-21 11:39:17,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54c0ecca5/158dae0d585641f2a6cbae5b02fc8053/FLAGb319e0303 [2020-07-21 11:39:18,370 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:39:18,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ssinaf.c [2020-07-21 11:39:18,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54c0ecca5/158dae0d585641f2a6cbae5b02fc8053/FLAGb319e0303 [2020-07-21 11:39:18,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54c0ecca5/158dae0d585641f2a6cbae5b02fc8053 [2020-07-21 11:39:18,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:39:18,751 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:39:18,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:18,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:39:18,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:39:18,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:18" (1/1) ... [2020-07-21 11:39:18,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21342210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:18, skipping insertion in model container [2020-07-21 11:39:18,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:18" (1/1) ... [2020-07-21 11:39:18,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:39:18,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:39:18,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:18,985 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:39:19,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:19,028 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:39:19,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19 WrapperNode [2020-07-21 11:39:19,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:19,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:39:19,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:39:19,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:39:19,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (1/1) ... [2020-07-21 11:39:19,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (1/1) ... [2020-07-21 11:39:19,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (1/1) ... [2020-07-21 11:39:19,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (1/1) ... [2020-07-21 11:39:19,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (1/1) ... [2020-07-21 11:39:19,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (1/1) ... [2020-07-21 11:39:19,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (1/1) ... [2020-07-21 11:39:19,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:39:19,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:39:19,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:39:19,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:39:19,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (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 [2020-07-21 11:39:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:39:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:39:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:39:19,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:39:19,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:39:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:39:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:39:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:39:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:39:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:39:19,245 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:39:19,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:39:19,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:39:19,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:39:19,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:39:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:39:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:39:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:39:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:39:19,624 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:39:19,625 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-21 11:39:19,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:19 BoogieIcfgContainer [2020-07-21 11:39:19,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:39:19,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:39:19,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:39:19,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:39:19,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:39:18" (1/3) ... [2020-07-21 11:39:19,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b985e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:19, skipping insertion in model container [2020-07-21 11:39:19,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:19" (2/3) ... [2020-07-21 11:39:19,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b985e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:19, skipping insertion in model container [2020-07-21 11:39:19,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:19" (3/3) ... [2020-07-21 11:39:19,650 INFO L109 eAbstractionObserver]: Analyzing ICFG ssinaf.c [2020-07-21 11:39:19,659 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:39:19,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:39:19,676 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:39:19,700 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:39:19,701 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:39:19,701 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:39:19,701 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:39:19,701 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:39:19,701 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:39:19,702 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:39:19,702 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:39:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-21 11:39:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:39:19,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:19,732 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] [2020-07-21 11:39:19,732 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1994596369, now seen corresponding path program 1 times [2020-07-21 11:39:19,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:19,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222584494] [2020-07-21 11:39:19,750 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 [2020-07-21 11:39:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:19,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:39:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:19,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:19,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222584494] [2020-07-21 11:39:19,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:19,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:39:19,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110842907] [2020-07-21 11:39:19,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:39:19,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:19,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:39:19,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:39:19,910 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2020-07-21 11:39:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:19,936 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2020-07-21 11:39:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:39:19,938 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2020-07-21 11:39:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:19,947 INFO L225 Difference]: With dead ends: 76 [2020-07-21 11:39:19,948 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 11:39:19,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:39:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 11:39:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-21 11:39:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 11:39:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-21 11:39:19,993 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 28 [2020-07-21 11:39:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:19,994 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-21 11:39:19,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:39:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-21 11:39:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:39:19,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:19,996 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] [2020-07-21 11:39:20,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:20,205 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:20,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1530390023, now seen corresponding path program 1 times [2020-07-21 11:39:20,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:20,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799304071] [2020-07-21 11:39:20,207 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 [2020-07-21 11:39:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:20,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:39:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:39:20,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:20,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799304071] [2020-07-21 11:39:20,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:20,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:39:20,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498551057] [2020-07-21 11:39:20,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:39:20,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:39:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:20,370 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 4 states. [2020-07-21 11:39:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:20,563 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-07-21 11:39:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:39:20,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-07-21 11:39:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:20,568 INFO L225 Difference]: With dead ends: 75 [2020-07-21 11:39:20,568 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 11:39:20,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:39:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 11:39:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-07-21 11:39:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 11:39:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-07-21 11:39:20,602 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 28 [2020-07-21 11:39:20,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:20,602 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-07-21 11:39:20,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:39:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-07-21 11:39:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 11:39:20,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:20,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:39:20,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:20,818 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1357692925, now seen corresponding path program 1 times [2020-07-21 11:39:20,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:20,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088052977] [2020-07-21 11:39:20,821 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 [2020-07-21 11:39:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:39:20,892 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:39:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:39:20,925 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:39:20,966 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:39:20,967 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:39:21,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:21,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:39:21 BoogieIcfgContainer [2020-07-21 11:39:21,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:39:21,228 INFO L168 Benchmark]: Toolchain (without parser) took 2477.91 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 101.8 MB in the beginning and 89.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 75.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:21,229 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 11:39:21,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.18 ms. Allocated memory is still 137.4 MB. Free memory was 101.3 MB in the beginning and 90.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:21,231 INFO L168 Benchmark]: Boogie Preprocessor took 140.62 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 178.2 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:21,232 INFO L168 Benchmark]: RCFGBuilder took 461.65 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 157.9 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:21,233 INFO L168 Benchmark]: TraceAbstraction took 1583.82 ms. Allocated memory is still 200.8 MB. Free memory was 157.3 MB in the beginning and 89.5 MB in the end (delta: 67.7 MB). Peak memory consumption was 67.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:21,237 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 277.18 ms. Allocated memory is still 137.4 MB. Free memory was 101.3 MB in the beginning and 90.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.62 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 178.2 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 461.65 ms. Allocated memory is still 200.8 MB. Free memory was 178.2 MB in the beginning and 157.9 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1583.82 ms. Allocated memory is still 200.8 MB. Free memory was 157.3 MB in the beginning and 89.5 MB in the end (delta: 67.7 MB). Peak memory consumption was 67.7 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)=4, 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); [L29] sum[0] = 0 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i