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_Camel.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 18:24:48,767 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 18:24:48,768 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 18:24:48,779 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 18:24:48,779 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 18:24:48,780 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 18:24:48,780 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 18:24:48,782 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 18:24:48,783 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 18:24:48,783 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 18:24:48,784 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 18:24:48,784 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 18:24:48,785 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 18:24:48,786 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 18:24:48,786 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 18:24:48,788 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 18:24:48,790 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 18:24:48,791 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 18:24:48,792 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 18:24:48,793 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 18:24:48,795 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-02 18:24:48,795 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-02 18:24:48,795 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-02 18:24:48,796 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-02 18:24:48,797 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-02 18:24:48,797 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-02 18:24:48,798 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-02 18:24:48,798 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-02 18:24:48,798 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-02 18:24:48,799 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 18:24:48,799 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 18:24:48,799 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-02 18:24:48,809 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 18:24:48,809 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 18:24:48,810 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 18:24:48,810 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 18:24:48,810 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 18:24:48,810 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 18:24:48,811 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 18:24:48,811 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 18:24:48,811 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 18:24:48,811 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 18:24:48,811 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 18:24:48,811 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 18:24:48,811 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 18:24:48,812 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 18:24:48,812 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 18:24:48,812 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 18:24:48,812 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 18:24:48,812 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 18:24:48,812 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 18:24:48,813 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 18:24:48,813 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 18:24:48,813 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 18:24:48,813 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 18:24:48,813 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 18:24:48,813 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 18:24:48,841 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 18:24:48,850 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 18:24:48,853 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 18:24:48,855 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 18:24:48,855 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 18:24:48,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-02-02 18:24:48,966 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 18:24:48,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 18:24:48,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 18:24:48,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 18:24:48,972 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 18:24:48,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:24:48" (1/1) ... [2018-02-02 18:24:48,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4631af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:48, skipping insertion in model container [2018-02-02 18:24:48,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:24:48" (1/1) ... [2018-02-02 18:24:48,984 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:24:49,009 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:24:49,090 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:24:49,103 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:24:49,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49 WrapperNode [2018-02-02 18:24:49,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 18:24:49,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 18:24:49,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 18:24:49,109 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 18:24:49,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (1/1) ... [2018-02-02 18:24:49,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (1/1) ... [2018-02-02 18:24:49,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (1/1) ... [2018-02-02 18:24:49,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (1/1) ... [2018-02-02 18:24:49,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (1/1) ... [2018-02-02 18:24:49,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (1/1) ... [2018-02-02 18:24:49,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (1/1) ... [2018-02-02 18:24:49,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 18:24:49,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 18:24:49,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 18:24:49,136 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 18:24:49,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (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 18:24:49,170 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 18:24:49,170 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 18:24:49,171 INFO L136 BoogieDeclarations]: Found implementation of procedure cmemrchr [2018-02-02 18:24:49,171 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure cmemrchr [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 18:24:49,171 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 18:24:49,303 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 18:24:49,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:24:49 BoogieIcfgContainer [2018-02-02 18:24:49,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 18:24:49,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 18:24:49,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 18:24:49,306 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 18:24:49,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 06:24:48" (1/3) ... [2018-02-02 18:24:49,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777d2661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:24:49, skipping insertion in model container [2018-02-02 18:24:49,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:24:49" (2/3) ... [2018-02-02 18:24:49,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777d2661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:24:49, skipping insertion in model container [2018-02-02 18:24:49,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:24:49" (3/3) ... [2018-02-02 18:24:49,308 INFO L107 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca_true-valid-memsafety_true-termination.i [2018-02-02 18:24:49,314 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 18:24:49,318 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-02-02 18:24:49,350 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 18:24:49,351 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 18:24:49,351 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 18:24:49,351 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 18:24:49,351 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 18:24:49,351 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 18:24:49,351 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 18:24:49,352 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 18:24:49,352 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 18:24:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-02-02 18:24:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-02 18:24:49,372 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:24:49,373 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:24:49,373 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 18:24:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1869622704, now seen corresponding path program 1 times [2018-02-02 18:24:49,379 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:24:49,379 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:24:49,411 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:49,411 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:49,411 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:49,475 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:24:49,604 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 18:24:49,606 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:24:49,606 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-02-02 18:24:49,607 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 18:24:49,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 18:24:49,615 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-02-02 18:24:49,617 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 8 states. [2018-02-02 18:24:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:24:49,806 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-02-02 18:24:49,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 18:24:49,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-02-02 18:24:49,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:24:49,822 INFO L225 Difference]: With dead ends: 33 [2018-02-02 18:24:49,822 INFO L226 Difference]: Without dead ends: 30 [2018-02-02 18:24:49,824 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 18:24:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-02 18:24:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2018-02-02 18:24:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-02-02 18:24:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-02-02 18:24:49,855 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2018-02-02 18:24:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:24:49,855 INFO L432 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-02-02 18:24:49,855 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 18:24:49,855 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-02-02 18:24:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-02 18:24:49,856 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:24:49,856 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:24:49,856 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 18:24:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1869622705, now seen corresponding path program 1 times [2018-02-02 18:24:49,856 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:24:49,856 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:24:49,857 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:49,858 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:49,858 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:49,877 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:24:50,020 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 18:24:50,021 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:24:50,021 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-02-02 18:24:50,022 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-02 18:24:50,022 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-02 18:24:50,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-02-02 18:24:50,023 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 9 states. [2018-02-02 18:24:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:24:50,198 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2018-02-02 18:24:50,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 18:24:50,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-02-02 18:24:50,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:24:50,199 INFO L225 Difference]: With dead ends: 53 [2018-02-02 18:24:50,199 INFO L226 Difference]: Without dead ends: 53 [2018-02-02 18:24:50,200 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 18:24:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-02-02 18:24:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2018-02-02 18:24:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-02 18:24:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2018-02-02 18:24:50,205 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 15 [2018-02-02 18:24:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:24:50,206 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2018-02-02 18:24:50,206 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-02 18:24:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2018-02-02 18:24:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-02-02 18:24:50,206 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:24:50,207 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:24:50,207 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 18:24:50,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1060276079, now seen corresponding path program 1 times [2018-02-02 18:24:50,207 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:24:50,207 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:24:50,211 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:50,212 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:50,212 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:50,224 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:24:50,353 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 18:24:50,353 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:24:50,353 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-02-02 18:24:50,353 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-02-02 18:24:50,353 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-02-02 18:24:50,353 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-02-02 18:24:50,354 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 10 states. [2018-02-02 18:24:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:24:50,529 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2018-02-02 18:24:50,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 18:24:50,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-02-02 18:24:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:24:50,530 INFO L225 Difference]: With dead ends: 54 [2018-02-02 18:24:50,530 INFO L226 Difference]: Without dead ends: 54 [2018-02-02 18:24:50,531 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:24:50,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-02-02 18:24:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 29. [2018-02-02 18:24:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-02-02 18:24:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-02-02 18:24:50,534 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 15 [2018-02-02 18:24:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:24:50,535 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-02-02 18:24:50,535 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-02-02 18:24:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-02-02 18:24:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 18:24:50,535 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:24:50,536 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 18:24:50,536 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 18:24:50,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1406269975, now seen corresponding path program 1 times [2018-02-02 18:24:50,536 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:24:50,536 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:24:50,536 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:50,537 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:50,537 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:50,554 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:24:50,697 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 18:24:50,697 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:24:50,697 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2018-02-02 18:24:50,697 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-02-02 18:24:50,698 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-02-02 18:24:50,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-02-02 18:24:50,698 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 11 states. [2018-02-02 18:24:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:24:50,870 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-02-02 18:24:50,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-02-02 18:24:50,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-02-02 18:24:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:24:50,872 INFO L225 Difference]: With dead ends: 49 [2018-02-02 18:24:50,872 INFO L226 Difference]: Without dead ends: 49 [2018-02-02 18:24:50,872 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 18:24:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-02-02 18:24:50,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-02-02 18:24:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-02 18:24:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2018-02-02 18:24:50,875 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 20 [2018-02-02 18:24:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:24:50,875 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2018-02-02 18:24:50,875 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-02-02 18:24:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2018-02-02 18:24:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 18:24:50,875 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:24:50,876 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 18:24:50,876 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 18:24:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2125153178, now seen corresponding path program 1 times [2018-02-02 18:24:50,876 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:24:50,876 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:24:50,876 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:50,877 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:50,877 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:50,882 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:24:50,927 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 18:24:50,928 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:24:50,928 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-02-02 18:24:50,928 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 18:24:50,928 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 18:24:50,928 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:24:50,929 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 5 states. [2018-02-02 18:24:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:24:50,956 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-02-02 18:24:50,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:24:50,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-02-02 18:24:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:24:50,957 INFO L225 Difference]: With dead ends: 59 [2018-02-02 18:24:50,957 INFO L226 Difference]: Without dead ends: 56 [2018-02-02 18:24:50,958 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 18:24:50,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-02-02 18:24:50,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2018-02-02 18:24:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-02-02 18:24:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2018-02-02 18:24:50,961 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 20 [2018-02-02 18:24:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:24:50,962 INFO L432 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2018-02-02 18:24:50,962 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 18:24:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2018-02-02 18:24:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 18:24:50,962 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:24:50,962 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 18:24:50,962 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 18:24:50,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1993075989, now seen corresponding path program 1 times [2018-02-02 18:24:50,963 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:24:50,963 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:24:50,964 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:50,964 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:50,964 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:50,974 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:24:51,113 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 18:24:51,114 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:24:51,114 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 18:24:51,119 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:51,138 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:24:51,177 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 18:24:51,178 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:24:51,182 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:24:51,182 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-02-02 18:24:51,406 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 18:24:51,424 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:24:51,424 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2018-02-02 18:24:51,424 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-02-02 18:24:51,424 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-02-02 18:24:51,425 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2018-02-02 18:24:51,425 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 23 states. [2018-02-02 18:24:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:24:51,935 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2018-02-02 18:24:51,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-02-02 18:24:51,936 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2018-02-02 18:24:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:24:51,936 INFO L225 Difference]: With dead ends: 55 [2018-02-02 18:24:51,936 INFO L226 Difference]: Without dead ends: 55 [2018-02-02 18:24:51,937 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2018-02-02 18:24:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-02-02 18:24:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2018-02-02 18:24:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-02-02 18:24:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2018-02-02 18:24:51,941 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 20 [2018-02-02 18:24:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:24:51,942 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2018-02-02 18:24:51,942 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-02-02 18:24:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2018-02-02 18:24:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-02-02 18:24:51,943 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:24:51,943 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 18:24:51,943 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 18:24:51,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1538347164, now seen corresponding path program 1 times [2018-02-02 18:24:51,943 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:24:51,943 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:24:51,944 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:51,944 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:51,944 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:51,953 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:24:51,981 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 18:24:51,981 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:24:51,981 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-02 18:24:51,982 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:24:51,982 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:24:51,982 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:24:51,982 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 4 states. [2018-02-02 18:24:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:24:52,014 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2018-02-02 18:24:52,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:24:52,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-02-02 18:24:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:24:52,019 INFO L225 Difference]: With dead ends: 46 [2018-02-02 18:24:52,020 INFO L226 Difference]: Without dead ends: 26 [2018-02-02 18:24:52,020 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:24:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-02-02 18:24:52,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-02-02 18:24:52,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-02-02 18:24:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-02-02 18:24:52,023 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-02-02 18:24:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:24:52,023 INFO L432 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-02-02 18:24:52,023 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:24:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-02-02 18:24:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-02-02 18:24:52,023 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:24:52,024 INFO L351 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:24:52,024 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cmemrchrErr0RequiresViolation, cmemrchrErr1RequiresViolation, mainErr0EnsuresViolation]=== [2018-02-02 18:24:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1560958191, now seen corresponding path program 2 times [2018-02-02 18:24:52,024 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:24:52,024 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:24:52,025 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:52,025 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:24:52,025 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:24:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:24:52,048 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:24:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:24:52,272 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:24:52,272 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 18:24:52,276 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:24:52,289 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:24:52,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:24:52,292 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:24:52,306 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 18:24:52,306 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-02-02 18:24:52,309 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-02-02 18:24:52,309 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2018-02-02 18:24:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:24:52,717 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:24:52,717 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2018-02-02 18:24:52,717 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-02-02 18:24:52,717 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-02-02 18:24:52,717 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2018-02-02 18:24:52,718 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 29 states. [2018-02-02 18:25:01,582 WARN L146 SmtUtils]: Spent 2120ms on a formula simplification. DAG size of input: 55 DAG size of output 46 [2018-02-02 18:25:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:25:04,936 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-02-02 18:25:04,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-02-02 18:25:04,936 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 25 [2018-02-02 18:25:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:25:04,936 INFO L225 Difference]: With dead ends: 31 [2018-02-02 18:25:04,936 INFO L226 Difference]: Without dead ends: 0 [2018-02-02 18:25:04,937 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=231, Invalid=1839, Unknown=0, NotChecked=0, Total=2070 [2018-02-02 18:25:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-02-02 18:25:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-02-02 18:25:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-02-02 18:25:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-02-02 18:25:04,938 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-02-02 18:25:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:25:04,938 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-02-02 18:25:04,938 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-02-02 18:25:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-02-02 18:25:04,938 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-02-02 18:25:04,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 06:25:04 BoogieIcfgContainer [2018-02-02 18:25:04,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 18:25:04,943 INFO L168 Benchmark]: Toolchain (without parser) took 15976.55 ms. Allocated memory was 404.8 MB in the beginning and 706.2 MB in the end (delta: 301.5 MB). Free memory was 362.8 MB in the beginning and 654.4 MB in the end (delta: -291.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 5.3 GB. [2018-02-02 18:25:04,944 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 404.8 MB. Free memory is still 368.1 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 18:25:04,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.74 ms. Allocated memory is still 404.8 MB. Free memory was 361.4 MB in the beginning and 352.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. [2018-02-02 18:25:04,945 INFO L168 Benchmark]: Boogie Preprocessor took 26.90 ms. Allocated memory is still 404.8 MB. Free memory was 352.2 MB in the beginning and 349.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. [2018-02-02 18:25:04,945 INFO L168 Benchmark]: RCFGBuilder took 167.60 ms. Allocated memory is still 404.8 MB. Free memory was 349.6 MB in the beginning and 333.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 5.3 GB. [2018-02-02 18:25:04,945 INFO L168 Benchmark]: TraceAbstraction took 15638.89 ms. Allocated memory was 404.8 MB in the beginning and 706.2 MB in the end (delta: 301.5 MB). Free memory was 333.7 MB in the beginning and 654.4 MB in the end (delta: -320.8 MB). There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 18:25:04,946 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 404.8 MB. Free memory is still 368.1 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 140.74 ms. Allocated memory is still 404.8 MB. Free memory was 361.4 MB in the beginning and 352.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 26.90 ms. Allocated memory is still 404.8 MB. Free memory was 352.2 MB in the beginning and 349.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 5.3 GB. * RCFGBuilder took 167.60 ms. Allocated memory is still 404.8 MB. Free memory was 349.6 MB in the beginning and 333.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 5.3 GB. * TraceAbstraction took 15638.89 ms. Allocated memory was 404.8 MB in the beginning and 706.2 MB in the end (delta: 301.5 MB). Free memory was 333.7 MB in the beginning and 654.4 MB in the end (delta: -320.8 MB). There was no memory consumed. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 3 error locations. SAFE Result, 15.5s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 13.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 174 SDtfs, 320 SDslu, 916 SDs, 0 SdLazy, 879 SolverSat, 112 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 68 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 185 ConstructedInterpolants, 0 QuantifiedInterpolants, 38009 SizeOfPredicates, 24 NumberOfNonLiveVariables, 228 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 2/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! 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_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_18-25-04-951.csv 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_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-02_18-25-04-951.csv Received shutdown request...