/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:57:49,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:57:49,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:57:49,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:57:49,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:57:49,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:57:49,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:57:49,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:57:49,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:57:49,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:57:49,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:57:49,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:57:49,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:57:49,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:57:49,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:57:49,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:57:49,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:57:49,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:57:49,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:57:49,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:57:49,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:57:49,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:57:49,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:57:49,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:57:49,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:57:49,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:57:49,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:57:49,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:57:49,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:57:49,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:57:49,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:57:49,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:57:49,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:57:49,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:57:49,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:57:49,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:57:49,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:57:49,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:57:49,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:57:49,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:57:49,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:57:49,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-27 21:57:49,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:57:49,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:57:49,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:57:49,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:57:49,792 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:57:49,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:57:49,793 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:57:49,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:57:49,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:57:49,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:57:49,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:57:49,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:57:49,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:57:49,795 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:57:49,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:57:49,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:57:49,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:57:49,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:57:49,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:57:49,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:57:49,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:57:49,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:57:49,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:57:49,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:57:49,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:57:49,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:57:49,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:57:49,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:57:49,801 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:57:49,802 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:57:50,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:57:50,270 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:57:50,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:57:50,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:57:50,276 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:57:50,278 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-27 21:57:50,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b6447f8e/0ecc6fc7936b4c379c66320332e35b8f/FLAG69fa0d1b9 [2020-08-27 21:57:50,911 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:57:50,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-27 21:57:50,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b6447f8e/0ecc6fc7936b4c379c66320332e35b8f/FLAG69fa0d1b9 [2020-08-27 21:57:51,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b6447f8e/0ecc6fc7936b4c379c66320332e35b8f [2020-08-27 21:57:51,266 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:57:51,268 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:57:51,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:57:51,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:57:51,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:57:51,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa297b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51, skipping insertion in model container [2020-08-27 21:57:51,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:57:51,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:57:51,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:57:51,560 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:57:51,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:57:51,602 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:57:51,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51 WrapperNode [2020-08-27 21:57:51,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:57:51,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:57:51,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:57:51,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:57:51,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (1/1) ... [2020-08-27 21:57:51,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:57:51,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:57:51,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:57:51,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:57:51,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-27 21:57:51,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:57:51,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:57:51,816 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-27 21:57:51,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-27 21:57:51,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:57:51,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:57:51,817 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-27 21:57:51,817 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-27 21:57:51,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-27 21:57:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:57:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-27 21:57:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:57:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-27 21:57:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-27 21:57:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-27 21:57:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-27 21:57:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-27 21:57:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:57:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:57:52,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:57:52,145 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-27 21:57:52,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:57:52 BoogieIcfgContainer [2020-08-27 21:57:52,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:57:52,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:57:52,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:57:52,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:57:52,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:57:51" (1/3) ... [2020-08-27 21:57:52,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5586d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:57:52, skipping insertion in model container [2020-08-27 21:57:52,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:57:51" (2/3) ... [2020-08-27 21:57:52,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e5586d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:57:52, skipping insertion in model container [2020-08-27 21:57:52,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:57:52" (3/3) ... [2020-08-27 21:57:52,162 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-08-27 21:57:52,173 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:57:52,183 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:57:52,205 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:57:52,229 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:57:52,229 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:57:52,229 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:57:52,229 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:57:52,229 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:57:52,229 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:57:52,229 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:57:52,229 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:57:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-27 21:57:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:57:52,255 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:57:52,256 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] [2020-08-27 21:57:52,257 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:57:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:57:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-27 21:57:52,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:57:52,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420733473] [2020-08-27 21:57:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:57:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:52,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:57:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:52,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:57:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:57:52,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420733473] [2020-08-27 21:57:52,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:57:52,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-27 21:57:52,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132905739] [2020-08-27 21:57:52,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-27 21:57:52,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:57:52,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-27 21:57:52,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:57:52,540 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-27 21:57:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:57:52,685 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-27 21:57:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-27 21:57:52,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-27 21:57:52,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:57:52,698 INFO L225 Difference]: With dead ends: 56 [2020-08-27 21:57:52,699 INFO L226 Difference]: Without dead ends: 26 [2020-08-27 21:57:52,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-27 21:57:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-27 21:57:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-27 21:57:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-27 21:57:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-27 21:57:52,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-27 21:57:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:57:52,748 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-27 21:57:52,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-27 21:57:52,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-27 21:57:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-27 21:57:52,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:57:52,749 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] [2020-08-27 21:57:52,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:57:52,750 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:57:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:57:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-27 21:57:52,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:57:52,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362019915] [2020-08-27 21:57:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:57:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:52,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:57:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:52,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:57:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:57:52,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362019915] [2020-08-27 21:57:52,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:57:52,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:57:52,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935531734] [2020-08-27 21:57:52,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:57:52,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:57:52,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:57:52,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:57:52,917 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-27 21:57:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:57:53,054 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-27 21:57:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-27 21:57:53,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-27 21:57:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:57:53,056 INFO L225 Difference]: With dead ends: 45 [2020-08-27 21:57:53,056 INFO L226 Difference]: Without dead ends: 32 [2020-08-27 21:57:53,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-27 21:57:53,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-27 21:57:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-27 21:57:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-27 21:57:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-27 21:57:53,066 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-27 21:57:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:57:53,067 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-27 21:57:53,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:57:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-27 21:57:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-27 21:57:53,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:57:53,068 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] [2020-08-27 21:57:53,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:57:53,069 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:57:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:57:53,070 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-27 21:57:53,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:57:53,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185067997] [2020-08-27 21:57:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:57:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:57:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:57:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-27 21:57:53,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185067997] [2020-08-27 21:57:53,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:57:53,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-27 21:57:53,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015134739] [2020-08-27 21:57:53,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:57:53,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:57:53,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:57:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:57:53,279 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-27 21:57:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:57:53,495 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-27 21:57:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:57:53,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-27 21:57:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:57:53,497 INFO L225 Difference]: With dead ends: 39 [2020-08-27 21:57:53,497 INFO L226 Difference]: Without dead ends: 33 [2020-08-27 21:57:53,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-27 21:57:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-27 21:57:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-27 21:57:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-27 21:57:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-27 21:57:53,505 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-27 21:57:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:57:53,506 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-27 21:57:53,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:57:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-27 21:57:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-27 21:57:53,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:57:53,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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] [2020-08-27 21:57:53,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:57:53,508 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:57:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:57:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-27 21:57:53,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:57:53,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669512821] [2020-08-27 21:57:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:57:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:57:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:57:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:57:53,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669512821] [2020-08-27 21:57:53,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:57:53,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:57:53,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180942135] [2020-08-27 21:57:53,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:57:53,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:57:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:57:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:57:53,630 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-27 21:57:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:57:53,786 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-27 21:57:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:57:53,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-27 21:57:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:57:53,788 INFO L225 Difference]: With dead ends: 54 [2020-08-27 21:57:53,788 INFO L226 Difference]: Without dead ends: 38 [2020-08-27 21:57:53,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:57:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-27 21:57:53,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-27 21:57:53,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-27 21:57:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-27 21:57:53,796 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-27 21:57:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:57:53,797 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-27 21:57:53,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:57:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-27 21:57:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-27 21:57:53,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:57:53,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:57:53,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:57:53,799 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:57:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:57:53,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-27 21:57:53,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:57:53,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925836374] [2020-08-27 21:57:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:57:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:57:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:57:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-27 21:57:53,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925836374] [2020-08-27 21:57:53,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:57:53,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-27 21:57:53,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676952277] [2020-08-27 21:57:53,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:57:53,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:57:53,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:57:53,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:57:53,954 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-27 21:57:54,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:57:54,069 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-27 21:57:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:57:54,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-27 21:57:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:57:54,071 INFO L225 Difference]: With dead ends: 55 [2020-08-27 21:57:54,071 INFO L226 Difference]: Without dead ends: 38 [2020-08-27 21:57:54,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:57:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-27 21:57:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-27 21:57:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-27 21:57:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-27 21:57:54,083 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-27 21:57:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:57:54,086 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-27 21:57:54,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:57:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-27 21:57:54,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-27 21:57:54,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:57:54,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2020-08-27 21:57:54,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:57:54,090 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:57:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:57:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-27 21:57:54,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:57:54,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532825805] [2020-08-27 21:57:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:57:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:54,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:57:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:54,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:57:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:57:54,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532825805] [2020-08-27 21:57:54,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:57:54,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-27 21:57:54,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764222010] [2020-08-27 21:57:54,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-27 21:57:54,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:57:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-27 21:57:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-27 21:57:54,470 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-08-27 21:57:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:57:54,985 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-27 21:57:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-27 21:57:54,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-08-27 21:57:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:57:54,986 INFO L225 Difference]: With dead ends: 46 [2020-08-27 21:57:54,986 INFO L226 Difference]: Without dead ends: 40 [2020-08-27 21:57:54,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-08-27 21:57:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-27 21:57:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-08-27 21:57:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-27 21:57:54,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-08-27 21:57:54,994 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-08-27 21:57:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:57:54,994 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-08-27 21:57:54,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-27 21:57:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-08-27 21:57:54,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-27 21:57:54,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:57:54,995 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:57:54,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:57:54,996 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:57:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:57:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-08-27 21:57:54,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:57:54,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77038157] [2020-08-27 21:57:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:57:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:55,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:57:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:55,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-27 21:57:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:57:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:57:55,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77038157] [2020-08-27 21:57:55,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:57:55,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:57:55,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124858298] [2020-08-27 21:57:55,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:57:55,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:57:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:57:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:57:55,105 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-08-27 21:57:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:57:55,287 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-08-27 21:57:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-27 21:57:55,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-27 21:57:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:57:55,289 INFO L225 Difference]: With dead ends: 66 [2020-08-27 21:57:55,289 INFO L226 Difference]: Without dead ends: 44 [2020-08-27 21:57:55,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:57:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-27 21:57:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-27 21:57:55,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-27 21:57:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-27 21:57:55,297 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-08-27 21:57:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:57:55,298 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-27 21:57:55,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:57:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-27 21:57:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-27 21:57:55,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:57:55,299 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:57:55,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-27 21:57:55,299 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:57:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:57:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-08-27 21:57:55,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:57:55,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841256213] [2020-08-27 21:57:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:57:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:57:55,333 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:57:55,334 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:57:55,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-27 21:57:55,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:57:55 BoogieIcfgContainer [2020-08-27 21:57:55,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:57:55,363 INFO L168 Benchmark]: Toolchain (without parser) took 4094.55 ms. Allocated memory was 146.3 MB in the beginning and 242.7 MB in the end (delta: 96.5 MB). Free memory was 102.8 MB in the beginning and 112.9 MB in the end (delta: -10.1 MB). Peak memory consumption was 86.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:57:55,364 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-27 21:57:55,365 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.31 ms. Allocated memory is still 146.3 MB. Free memory was 102.6 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-27 21:57:55,366 INFO L168 Benchmark]: Boogie Preprocessor took 139.55 ms. Allocated memory was 146.3 MB in the beginning and 205.0 MB in the end (delta: 58.7 MB). Free memory was 92.1 MB in the beginning and 183.0 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-27 21:57:55,367 INFO L168 Benchmark]: RCFGBuilder took 406.88 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 166.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-08-27 21:57:55,367 INFO L168 Benchmark]: TraceAbstraction took 3208.66 ms. Allocated memory was 205.0 MB in the beginning and 242.7 MB in the end (delta: 37.7 MB). Free memory was 165.4 MB in the beginning and 112.9 MB in the end (delta: 52.5 MB). Peak memory consumption was 90.2 MB. Max. memory is 7.1 GB. [2020-08-27 21:57:55,376 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 334.31 ms. Allocated memory is still 146.3 MB. Free memory was 102.6 MB in the beginning and 92.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.55 ms. Allocated memory was 146.3 MB in the beginning and 205.0 MB in the end (delta: 58.7 MB). Free memory was 92.1 MB in the beginning and 183.0 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.88 ms. Allocated memory is still 205.0 MB. Free memory was 182.4 MB in the beginning and 166.0 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3208.66 ms. Allocated memory was 205.0 MB in the beginning and 242.7 MB in the end (delta: 37.7 MB). Free memory was 165.4 MB in the beginning and 112.9 MB in the end (delta: 52.5 MB). Peak memory consumption was 90.2 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; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i