java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-a74eeac-m [2018-02-02 20:59:34,721 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 20:59:34,722 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 20:59:34,734 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 20:59:34,734 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 20:59:34,735 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 20:59:34,736 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 20:59:34,737 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 20:59:34,738 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 20:59:34,739 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 20:59:34,740 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 20:59:34,740 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 20:59:34,741 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 20:59:34,742 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 20:59:34,743 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 20:59:34,745 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 20:59:34,746 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 20:59:34,748 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 20:59:34,749 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 20:59:34,749 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 20:59:34,751 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-02 20:59:34,751 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-02 20:59:34,752 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-02 20:59:34,753 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-02 20:59:34,753 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-02 20:59:34,754 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-02 20:59:34,754 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-02 20:59:34,755 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-02 20:59:34,755 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-02 20:59:34,755 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 20:59:34,756 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 20:59:34,756 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf [2018-02-02 20:59:34,765 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 20:59:34,766 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 20:59:34,767 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 20:59:34,767 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 20:59:34,767 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 20:59:34,767 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 20:59:34,767 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 20:59:34,768 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 20:59:34,768 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 20:59:34,768 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 20:59:34,768 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 20:59:34,768 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 20:59:34,768 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 20:59:34,768 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 20:59:34,769 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 20:59:34,769 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 20:59:34,769 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 20:59:34,769 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 20:59:34,769 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 20:59:34,769 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 20:59:34,770 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 20:59:34,770 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 20:59:34,770 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 20:59:34,770 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 20:59:34,770 INFO L133 SettingsManager]: * Trace refinement strategy=SMTINTERPOL [2018-02-02 20:59:34,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 20:59:34,810 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 20:59:34,814 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 20:59:34,815 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 20:59:34,815 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 20:59:34,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-02-02 20:59:34,942 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 20:59:34,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 20:59:34,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 20:59:34,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 20:59:34,950 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 20:59:34,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:59:34" (1/1) ... [2018-02-02 20:59:34,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ab297d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:34, skipping insertion in model container [2018-02-02 20:59:34,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 08:59:34" (1/1) ... [2018-02-02 20:59:34,972 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 20:59:35,005 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 20:59:35,095 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 20:59:35,106 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 20:59:35,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35 WrapperNode [2018-02-02 20:59:35,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 20:59:35,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 20:59:35,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 20:59:35,112 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 20:59:35,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (1/1) ... [2018-02-02 20:59:35,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (1/1) ... [2018-02-02 20:59:35,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (1/1) ... [2018-02-02 20:59:35,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (1/1) ... [2018-02-02 20:59:35,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (1/1) ... [2018-02-02 20:59:35,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (1/1) ... [2018-02-02 20:59:35,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (1/1) ... [2018-02-02 20:59:35,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 20:59:35,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 20:59:35,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 20:59:35,140 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 20:59:35,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-02-02 20:59:35,175 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 20:59:35,176 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 20:59:35,176 INFO L136 BoogieDeclarations]: Found implementation of procedure cmemrchr [2018-02-02 20:59:35,176 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 20:59:35,176 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 20:59:35,176 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 20:59:35,176 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 20:59:35,176 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 20:59:35,177 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 20:59:35,177 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 20:59:35,177 INFO L128 BoogieDeclarations]: Found specification of procedure cmemrchr [2018-02-02 20:59:35,177 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 20:59:35,177 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 20:59:35,177 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 20:59:35,286 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 20:59:35,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:59:35 BoogieIcfgContainer [2018-02-02 20:59:35,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 20:59:35,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 20:59:35,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 20:59:35,289 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 20:59:35,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 08:59:34" (1/3) ... [2018-02-02 20:59:35,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721de6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:59:35, skipping insertion in model container [2018-02-02 20:59:35,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 08:59:35" (2/3) ... [2018-02-02 20:59:35,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721de6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 08:59:35, skipping insertion in model container [2018-02-02 20:59:35,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 08:59:35" (3/3) ... [2018-02-02 20:59:35,292 INFO L107 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-02-02 20:59:35,298 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 20:59:35,303 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-02-02 20:59:35,334 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 20:59:35,334 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 20:59:35,334 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 20:59:35,334 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 20:59:35,334 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 20:59:35,334 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 20:59:35,334 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 20:59:35,334 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 20:59:35,335 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 20:59:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-02-02 20:59:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-02 20:59:35,349 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 20:59:35,350 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 20:59:35,350 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 20:59:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1869622704, now seen corresponding path program 1 times [2018-02-02 20:59:35,355 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-02 20:59:35,355 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-02 20:59:35,387 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:35,387 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 20:59:35,387 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 20:59:35,438 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 20:59:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 20:59:35,543 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 20:59:35,543 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-02 20:59:35,544 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 20:59:35,553 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 20:59:35,553 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-02-02 20:59:35,555 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 8 states. [2018-02-02 20:59:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 20:59:35,742 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-02-02 20:59:35,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 20:59:35,744 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-02-02 20:59:35,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 20:59:35,757 INFO L225 Difference]: With dead ends: 33 [2018-02-02 20:59:35,758 INFO L226 Difference]: Without dead ends: 30 [2018-02-02 20:59:35,759 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-02-02 20:59:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-02 20:59:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2018-02-02 20:59:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-02-02 20:59:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-02-02 20:59:35,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2018-02-02 20:59:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 20:59:35,784 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-02-02 20:59:35,784 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 20:59:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-02-02 20:59:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-02 20:59:35,784 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 20:59:35,784 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 20:59:35,784 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 20:59:35,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1869622705, now seen corresponding path program 1 times [2018-02-02 20:59:35,785 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-02 20:59:35,785 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-02 20:59:35,785 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:35,786 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 20:59:35,786 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 20:59:35,806 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 20:59:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 20:59:35,983 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 20:59:35,983 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-02-02 20:59:35,984 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-02 20:59:35,984 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-02 20:59:35,985 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-02-02 20:59:35,985 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 9 states. [2018-02-02 20:59:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 20:59:36,172 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2018-02-02 20:59:36,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 20:59:36,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-02-02 20:59:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 20:59:36,174 INFO L225 Difference]: With dead ends: 53 [2018-02-02 20:59:36,175 INFO L226 Difference]: Without dead ends: 53 [2018-02-02 20:59:36,176 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2018-02-02 20:59:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-02-02 20:59:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2018-02-02 20:59:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-02 20:59:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2018-02-02 20:59:36,183 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2018-02-02 20:59:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 20:59:36,183 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2018-02-02 20:59:36,183 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-02 20:59:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2018-02-02 20:59:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-02 20:59:36,185 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 20:59:36,185 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 20:59:36,185 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 20:59:36,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1060276079, now seen corresponding path program 1 times [2018-02-02 20:59:36,186 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-02 20:59:36,186 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-02 20:59:36,187 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:36,187 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 20:59:36,187 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 20:59:36,211 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 20:59:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 20:59:36,348 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 20:59:36,348 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-02-02 20:59:36,348 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-02-02 20:59:36,348 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-02-02 20:59:36,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-02-02 20:59:36,348 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 10 states. [2018-02-02 20:59:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 20:59:36,459 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2018-02-02 20:59:36,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 20:59:36,460 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-02-02 20:59:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 20:59:36,461 INFO L225 Difference]: With dead ends: 54 [2018-02-02 20:59:36,461 INFO L226 Difference]: Without dead ends: 54 [2018-02-02 20:59:36,461 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-02-02 20:59:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-02-02 20:59:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 29. [2018-02-02 20:59:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-02-02 20:59:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-02-02 20:59:36,464 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 15 [2018-02-02 20:59:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 20:59:36,465 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-02-02 20:59:36,465 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-02-02 20:59:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-02-02 20:59:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 20:59:36,465 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 20:59:36,465 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 20:59:36,465 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 20:59:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1406269975, now seen corresponding path program 1 times [2018-02-02 20:59:36,465 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-02 20:59:36,466 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-02 20:59:36,466 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:36,466 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 20:59:36,466 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 20:59:36,484 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 20:59:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 20:59:36,654 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 20:59:36,654 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-02-02 20:59:36,654 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-02-02 20:59:36,654 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-02-02 20:59:36,654 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-02-02 20:59:36,655 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 11 states. [2018-02-02 20:59:36,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 20:59:36,832 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-02-02 20:59:36,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-02-02 20:59:36,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-02-02 20:59:36,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 20:59:36,833 INFO L225 Difference]: With dead ends: 49 [2018-02-02 20:59:36,833 INFO L226 Difference]: Without dead ends: 49 [2018-02-02 20:59:36,833 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2018-02-02 20:59:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-02 20:59:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-02-02 20:59:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-02 20:59:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2018-02-02 20:59:36,836 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 20 [2018-02-02 20:59:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 20:59:36,837 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2018-02-02 20:59:36,837 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-02-02 20:59:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2018-02-02 20:59:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 20:59:36,838 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 20:59:36,838 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 20:59:36,838 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 20:59:36,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2125153178, now seen corresponding path program 1 times [2018-02-02 20:59:36,839 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-02 20:59:36,839 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-02 20:59:36,839 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:36,840 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 20:59:36,840 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 20:59:36,846 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 20:59:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 20:59:36,876 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 20:59:36,876 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-02 20:59:36,877 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 20:59:36,877 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 20:59:36,877 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-02 20:59:36,877 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2018-02-02 20:59:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 20:59:36,901 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-02-02 20:59:36,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 20:59:36,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-02-02 20:59:36,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 20:59:36,902 INFO L225 Difference]: With dead ends: 59 [2018-02-02 20:59:36,902 INFO L226 Difference]: Without dead ends: 56 [2018-02-02 20:59:36,902 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-02-02 20:59:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-02-02 20:59:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2018-02-02 20:59:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-02 20:59:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-02-02 20:59:36,906 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 20 [2018-02-02 20:59:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 20:59:36,906 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-02-02 20:59:36,906 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 20:59:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-02-02 20:59:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 20:59:36,907 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 20:59:36,907 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 20:59:36,907 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 20:59:36,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1993075989, now seen corresponding path program 1 times [2018-02-02 20:59:36,908 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-02 20:59:36,908 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-02 20:59:36,908 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:36,908 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 20:59:36,908 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 20:59:36,921 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 20:59:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 20:59:37,073 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 20:59:37,073 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_FP [2018-02-02 20:59:37,074 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 20:59:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 20:59:37,106 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 20:59:37,131 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2018-02-02 20:59:37,132 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 20:59:37,135 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 20:59:37,135 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:10, output treesize:3 [2018-02-02 20:59:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 20:59:37,377 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 20:59:37,377 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-02-02 20:59:37,378 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-02-02 20:59:37,378 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-02-02 20:59:37,378 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2018-02-02 20:59:37,378 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 18 states. [2018-02-02 20:59:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 20:59:37,834 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2018-02-02 20:59:37,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-02-02 20:59:37,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2018-02-02 20:59:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 20:59:37,835 INFO L225 Difference]: With dead ends: 49 [2018-02-02 20:59:37,835 INFO L226 Difference]: Without dead ends: 49 [2018-02-02 20:59:37,836 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2018-02-02 20:59:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-02 20:59:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2018-02-02 20:59:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-02-02 20:59:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-02-02 20:59:37,839 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2018-02-02 20:59:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 20:59:37,839 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2018-02-02 20:59:37,839 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-02-02 20:59:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2018-02-02 20:59:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 20:59:37,840 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 20:59:37,840 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 20:59:37,841 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 20:59:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1538347164, now seen corresponding path program 1 times [2018-02-02 20:59:37,841 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS_NO_ARRAY [2018-02-02 20:59:37,841 INFO L67 tionRefinementEngine]: Using refinement strategy SmtInterpolRefinementStrategy [2018-02-02 20:59:37,842 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:37,842 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 20:59:37,842 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 20:59:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 20:59:37,853 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 20:59:37,856 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Unknown lemma type! at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:299) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:263) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:132) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:220) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:915) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackTraceAbstractionRefinementStrategy.getTraceCheck(MultiTrackTraceAbstractionRefinementStrategy.java:222) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:231) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:205) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:397) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:381) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:115) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:119) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-02-02 20:59:37,859 INFO L168 Benchmark]: Toolchain (without parser) took 2917.27 ms. Allocated memory was 404.2 MB in the beginning and 657.5 MB in the end (delta: 253.2 MB). Free memory was 362.4 MB in the beginning and 592.7 MB in the end (delta: -230.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 5.3 GB. [2018-02-02 20:59:37,860 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 404.2 MB. Free memory is still 367.7 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 20:59:37,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.92 ms. Allocated memory is still 404.2 MB. Free memory was 361.1 MB in the beginning and 351.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-02 20:59:37,861 INFO L168 Benchmark]: Boogie Preprocessor took 28.04 ms. Allocated memory is still 404.2 MB. Free memory was 351.9 MB in the beginning and 349.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 20:59:37,861 INFO L168 Benchmark]: RCFGBuilder took 147.01 ms. Allocated memory is still 404.2 MB. Free memory was 349.2 MB in the beginning and 333.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 5.3 GB. [2018-02-02 20:59:37,861 INFO L168 Benchmark]: TraceAbstraction took 2571.30 ms. Allocated memory was 404.2 MB in the beginning and 657.5 MB in the end (delta: 253.2 MB). Free memory was 333.8 MB in the beginning and 592.7 MB in the end (delta: -258.9 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 20:59:37,863 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 404.2 MB. Free memory is still 367.7 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 167.92 ms. Allocated memory is still 404.2 MB. Free memory was 361.1 MB in the beginning and 351.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 28.04 ms. Allocated memory is still 404.2 MB. Free memory was 351.9 MB in the beginning and 349.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 147.01 ms. Allocated memory is still 404.2 MB. Free memory was 349.2 MB in the beginning and 333.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 5.3 GB. * TraceAbstraction took 2571.30 ms. Allocated memory was 404.2 MB in the beginning and 657.5 MB in the end (delta: 253.2 MB). Free memory was 333.8 MB in the beginning and 592.7 MB in the end (delta: -258.9 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Unknown lemma type! de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Unknown lemma type!: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:299) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i_svcomp-DerefFreeMemtrack-32bit-Automizer_SmtInterpol_NoArray.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_20-59-37-870.csv Received shutdown request...