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/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf -i ../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpncpy-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-6b94a2f [2018-01-24 23:16:32,585 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-24 23:16:32,587 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-24 23:16:32,599 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-24 23:16:32,599 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-24 23:16:32,600 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-24 23:16:32,601 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-24 23:16:32,603 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-24 23:16:32,605 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-24 23:16:32,606 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-24 23:16:32,607 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-24 23:16:32,607 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-24 23:16:32,607 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-24 23:16:32,609 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-24 23:16:32,610 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-24 23:16:32,612 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-24 23:16:32,614 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-24 23:16:32,616 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-24 23:16:32,618 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-24 23:16:32,619 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-24 23:16:32,621 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-01-24 23:16:32,621 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-01-24 23:16:32,622 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-01-24 23:16:32,623 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-01-24 23:16:32,623 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-01-24 23:16:32,625 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-01-24 23:16:32,625 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-01-24 23:16:32,626 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-01-24 23:16:32,626 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-01-24 23:16:32,626 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-24 23:16:32,627 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-24 23:16:32,627 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/svcomp-DerefFreeMemtrack-32bit-Automizer_Taipan+AI_EQ_precise.epf [2018-01-24 23:16:32,637 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-24 23:16:32,637 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-24 23:16:32,638 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-24 23:16:32,638 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-24 23:16:32,638 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-24 23:16:32,639 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-24 23:16:32,639 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-24 23:16:32,639 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-24 23:16:32,640 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-24 23:16:32,640 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-24 23:16:32,640 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-24 23:16:32,640 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-24 23:16:32,641 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-24 23:16:32,641 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-24 23:16:32,641 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-01-24 23:16:32,641 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-01-24 23:16:32,641 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-01-24 23:16:32,641 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-24 23:16:32,642 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-24 23:16:32,642 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-24 23:16:32,642 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-24 23:16:32,642 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-24 23:16:32,643 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-24 23:16:32,643 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-24 23:16:32,643 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-24 23:16:32,643 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-24 23:16:32,643 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-24 23:16:32,644 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-24 23:16:32,644 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-24 23:16:32,644 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-24 23:16:32,644 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-24 23:16:32,644 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-24 23:16:32,645 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-24 23:16:32,645 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-24 23:16:32,646 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-24 23:16:32,646 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-24 23:16:32,679 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-24 23:16:32,692 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-24 23:16:32,696 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-24 23:16:32,698 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-24 23:16:32,699 INFO L276 PluginConnector]: CDTParser initialized [2018-01-24 23:16:32,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/openbsd_cstpncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:16:32,876 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-24 23:16:32,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-24 23:16:32,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-24 23:16:32,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-24 23:16:32,890 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-24 23:16:32,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:16:32" (1/1) ... [2018-01-24 23:16:32,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aad67c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:32, skipping insertion in model container [2018-01-24 23:16:32,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.01 11:16:32" (1/1) ... [2018-01-24 23:16:32,912 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:16:32,952 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-24 23:16:33,065 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:16:33,081 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-24 23:16:33,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33 WrapperNode [2018-01-24 23:16:33,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-24 23:16:33,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-24 23:16:33,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-24 23:16:33,089 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-24 23:16:33,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (1/1) ... [2018-01-24 23:16:33,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (1/1) ... [2018-01-24 23:16:33,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (1/1) ... [2018-01-24 23:16:33,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (1/1) ... [2018-01-24 23:16:33,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (1/1) ... [2018-01-24 23:16:33,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (1/1) ... [2018-01-24 23:16:33,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (1/1) ... [2018-01-24 23:16:33,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-24 23:16:33,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-24 23:16:33,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-24 23:16:33,128 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-24 23:16:33,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (1/1) ... No working directory specified, using /storage/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 [2018-01-24 23:16:33,174 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-24 23:16:33,175 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-24 23:16:33,175 INFO L136 BoogieDeclarations]: Found implementation of procedure cstpncpy [2018-01-24 23:16:33,175 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-24 23:16:33,175 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-24 23:16:33,175 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-24 23:16:33,175 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-24 23:16:33,175 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-24 23:16:33,175 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-24 23:16:33,175 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-24 23:16:33,175 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-24 23:16:33,176 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-24 23:16:33,176 INFO L128 BoogieDeclarations]: Found specification of procedure cstpncpy [2018-01-24 23:16:33,176 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-24 23:16:33,176 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-24 23:16:33,176 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-24 23:16:33,472 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-24 23:16:33,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:16:33 BoogieIcfgContainer [2018-01-24 23:16:33,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-24 23:16:33,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-24 23:16:33,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-24 23:16:33,476 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-24 23:16:33,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.01 11:16:32" (1/3) ... [2018-01-24 23:16:33,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b05fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:16:33, skipping insertion in model container [2018-01-24 23:16:33,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.01 11:16:33" (2/3) ... [2018-01-24 23:16:33,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b05fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.01 11:16:33, skipping insertion in model container [2018-01-24 23:16:33,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.01 11:16:33" (3/3) ... [2018-01-24 23:16:33,480 INFO L105 eAbstractionObserver]: Analyzing ICFG openbsd_cstpncpy-alloca_true-valid-memsafety_true-termination.i [2018-01-24 23:16:33,490 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-24 23:16:33,498 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2018-01-24 23:16:33,549 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-24 23:16:33,549 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-24 23:16:33,549 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-24 23:16:33,549 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-24 23:16:33,549 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-24 23:16:33,550 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-24 23:16:33,550 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-24 23:16:33,550 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-01-24 23:16:33,551 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-24 23:16:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2018-01-24 23:16:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:16:33,579 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:33,580 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:33,580 INFO L371 AbstractCegarLoop]: === Iteration 1 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash 149116887, now seen corresponding path program 1 times [2018-01-24 23:16:33,588 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:33,639 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:33,639 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:33,639 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:33,639 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:33,694 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:33,779 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:33,780 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-24 23:16:33,780 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:33,783 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-24 23:16:33,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-24 23:16:33,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-24 23:16:33,797 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 4 states. [2018-01-24 23:16:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:34,057 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-01-24 23:16:34,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-24 23:16:34,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-01-24 23:16:34,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:34,068 INFO L225 Difference]: With dead ends: 89 [2018-01-24 23:16:34,068 INFO L226 Difference]: Without dead ends: 67 [2018-01-24 23:16:34,071 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:16:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-01-24 23:16:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-01-24 23:16:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-24 23:16:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2018-01-24 23:16:34,104 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 13 [2018-01-24 23:16:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:34,105 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2018-01-24 23:16:34,105 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-24 23:16:34,105 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2018-01-24 23:16:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-24 23:16:34,105 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:34,105 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:34,106 INFO L371 AbstractCegarLoop]: === Iteration 2 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:34,106 INFO L82 PathProgramCache]: Analyzing trace with hash 149116888, now seen corresponding path program 1 times [2018-01-24 23:16:34,106 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:34,107 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,107 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:34,107 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,107 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:34,128 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:34,237 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:34,237 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-24 23:16:34,237 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:34,238 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:16:34,238 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:16:34,239 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:16:34,239 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 5 states. [2018-01-24 23:16:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:34,309 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2018-01-24 23:16:34,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:16:34,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-01-24 23:16:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:34,311 INFO L225 Difference]: With dead ends: 67 [2018-01-24 23:16:34,312 INFO L226 Difference]: Without dead ends: 66 [2018-01-24 23:16:34,313 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:16:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-24 23:16:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-01-24 23:16:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-24 23:16:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2018-01-24 23:16:34,321 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 13 [2018-01-24 23:16:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:34,322 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2018-01-24 23:16:34,322 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:16:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2018-01-24 23:16:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:16:34,322 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:34,323 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:34,323 INFO L371 AbstractCegarLoop]: === Iteration 3 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:34,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1345074556, now seen corresponding path program 1 times [2018-01-24 23:16:34,323 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:34,324 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,325 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:34,325 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,325 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:34,345 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:34,374 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:34,374 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:16:34,374 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:34,374 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:16:34,374 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:16:34,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:16:34,375 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 3 states. [2018-01-24 23:16:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:34,433 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2018-01-24 23:16:34,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:16:34,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-01-24 23:16:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:34,435 INFO L225 Difference]: With dead ends: 66 [2018-01-24 23:16:34,435 INFO L226 Difference]: Without dead ends: 60 [2018-01-24 23:16:34,436 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:16:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-24 23:16:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-01-24 23:16:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-01-24 23:16:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2018-01-24 23:16:34,443 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 16 [2018-01-24 23:16:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:34,443 INFO L432 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2018-01-24 23:16:34,443 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:16:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2018-01-24 23:16:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-01-24 23:16:34,444 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:34,444 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:34,444 INFO L371 AbstractCegarLoop]: === Iteration 4 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1345074557, now seen corresponding path program 1 times [2018-01-24 23:16:34,445 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:34,446 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,446 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:34,446 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,446 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:34,463 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:34,502 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:34,502 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-24 23:16:34,502 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:34,502 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-24 23:16:34,503 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-24 23:16:34,503 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:16:34,503 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 3 states. [2018-01-24 23:16:34,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:34,545 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-01-24 23:16:34,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-24 23:16:34,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-01-24 23:16:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:34,547 INFO L225 Difference]: With dead ends: 60 [2018-01-24 23:16:34,547 INFO L226 Difference]: Without dead ends: 54 [2018-01-24 23:16:34,548 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-24 23:16:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-01-24 23:16:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-01-24 23:16:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-24 23:16:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-24 23:16:34,554 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 16 [2018-01-24 23:16:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:34,555 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-24 23:16:34,555 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-24 23:16:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-24 23:16:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:16:34,556 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:34,556 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:34,556 INFO L371 AbstractCegarLoop]: === Iteration 5 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1779018923, now seen corresponding path program 1 times [2018-01-24 23:16:34,557 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:34,558 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,558 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:34,558 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,558 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:34,589 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:34,736 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:34,736 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-01-24 23:16:34,736 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:34,736 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-24 23:16:34,736 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-24 23:16:34,737 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-01-24 23:16:34,737 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 9 states. [2018-01-24 23:16:34,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:34,901 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2018-01-24 23:16:34,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-01-24 23:16:34,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-01-24 23:16:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:34,971 INFO L225 Difference]: With dead ends: 57 [2018-01-24 23:16:34,971 INFO L226 Difference]: Without dead ends: 56 [2018-01-24 23:16:34,972 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-01-24 23:16:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-24 23:16:34,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-01-24 23:16:34,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-24 23:16:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2018-01-24 23:16:34,977 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 25 [2018-01-24 23:16:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:34,978 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2018-01-24 23:16:34,978 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-24 23:16:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2018-01-24 23:16:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-24 23:16:34,979 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:34,979 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:34,979 INFO L371 AbstractCegarLoop]: === Iteration 6 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:34,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1779018922, now seen corresponding path program 1 times [2018-01-24 23:16:34,979 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:34,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,980 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:34,980 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:34,980 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:35,002 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:35,202 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:35,202 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2018-01-24 23:16:35,202 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:35,202 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-01-24 23:16:35,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-01-24 23:16:35,203 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2018-01-24 23:16:35,203 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 11 states. [2018-01-24 23:16:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:35,430 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2018-01-24 23:16:35,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-01-24 23:16:35,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2018-01-24 23:16:35,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:35,431 INFO L225 Difference]: With dead ends: 60 [2018-01-24 23:16:35,431 INFO L226 Difference]: Without dead ends: 59 [2018-01-24 23:16:35,431 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-01-24 23:16:35,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-24 23:16:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-01-24 23:16:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-24 23:16:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2018-01-24 23:16:35,436 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 25 [2018-01-24 23:16:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:35,436 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2018-01-24 23:16:35,436 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-01-24 23:16:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2018-01-24 23:16:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 23:16:35,437 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:35,437 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:35,437 INFO L371 AbstractCegarLoop]: === Iteration 7 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash 684988236, now seen corresponding path program 1 times [2018-01-24 23:16:35,437 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:35,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:35,438 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:35,438 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:35,438 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:35,460 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:35,778 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:35,778 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-01-24 23:16:35,778 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:35,778 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-01-24 23:16:35,778 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-01-24 23:16:35,778 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2018-01-24 23:16:35,779 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 14 states. [2018-01-24 23:16:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:36,104 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2018-01-24 23:16:36,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-24 23:16:36,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-01-24 23:16:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:36,105 INFO L225 Difference]: With dead ends: 58 [2018-01-24 23:16:36,105 INFO L226 Difference]: Without dead ends: 57 [2018-01-24 23:16:36,106 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2018-01-24 23:16:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-01-24 23:16:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2018-01-24 23:16:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-24 23:16:36,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-24 23:16:36,112 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2018-01-24 23:16:36,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:36,113 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-24 23:16:36,113 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-01-24 23:16:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-24 23:16:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-01-24 23:16:36,114 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:36,114 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:36,114 INFO L371 AbstractCegarLoop]: === Iteration 8 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:36,114 INFO L82 PathProgramCache]: Analyzing trace with hash 684988237, now seen corresponding path program 1 times [2018-01-24 23:16:36,115 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:36,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:36,116 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:36,116 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:36,116 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:36,139 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:36,428 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:36,428 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2018-01-24 23:16:36,428 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:36,428 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-24 23:16:36,429 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-24 23:16:36,429 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2018-01-24 23:16:36,429 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 13 states. [2018-01-24 23:16:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:36,642 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2018-01-24 23:16:36,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-24 23:16:36,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2018-01-24 23:16:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:36,643 INFO L225 Difference]: With dead ends: 60 [2018-01-24 23:16:36,644 INFO L226 Difference]: Without dead ends: 59 [2018-01-24 23:16:36,644 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2018-01-24 23:16:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-24 23:16:36,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-01-24 23:16:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-24 23:16:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2018-01-24 23:16:36,651 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 26 [2018-01-24 23:16:36,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:36,651 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2018-01-24 23:16:36,651 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-24 23:16:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2018-01-24 23:16:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 23:16:36,653 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:36,653 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:36,653 INFO L371 AbstractCegarLoop]: === Iteration 9 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1786557187, now seen corresponding path program 1 times [2018-01-24 23:16:36,653 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:36,654 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:36,654 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:36,655 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:36,655 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:36,668 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:36,738 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:36,738 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-24 23:16:36,738 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:36,739 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-24 23:16:36,739 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-24 23:16:36,739 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-24 23:16:36,739 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 5 states. [2018-01-24 23:16:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:36,790 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2018-01-24 23:16:36,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-24 23:16:36,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2018-01-24 23:16:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:36,797 INFO L225 Difference]: With dead ends: 86 [2018-01-24 23:16:36,797 INFO L226 Difference]: Without dead ends: 79 [2018-01-24 23:16:36,798 INFO L525 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 [2018-01-24 23:16:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-24 23:16:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2018-01-24 23:16:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-01-24 23:16:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2018-01-24 23:16:36,815 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 30 [2018-01-24 23:16:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:36,815 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2018-01-24 23:16:36,815 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-24 23:16:36,815 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2018-01-24 23:16:36,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-24 23:16:36,817 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:36,817 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:36,817 INFO L371 AbstractCegarLoop]: === Iteration 10 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash -18881147, now seen corresponding path program 1 times [2018-01-24 23:16:36,817 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:36,818 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:36,818 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:36,818 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:36,819 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:36,834 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:36,879 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:36,879 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:16:36,879 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:36,880 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:16:36,880 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:16:36,880 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:16:36,880 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 6 states. [2018-01-24 23:16:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:36,933 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2018-01-24 23:16:36,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:16:36,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-01-24 23:16:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:36,935 INFO L225 Difference]: With dead ends: 79 [2018-01-24 23:16:36,935 INFO L226 Difference]: Without dead ends: 66 [2018-01-24 23:16:36,935 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-01-24 23:16:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-01-24 23:16:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2018-01-24 23:16:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-24 23:16:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2018-01-24 23:16:36,942 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 30 [2018-01-24 23:16:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:36,942 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2018-01-24 23:16:36,942 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:16:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2018-01-24 23:16:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 23:16:36,944 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:36,944 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:36,944 INFO L371 AbstractCegarLoop]: === Iteration 11 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:36,944 INFO L82 PathProgramCache]: Analyzing trace with hash -25567208, now seen corresponding path program 1 times [2018-01-24 23:16:36,944 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:36,945 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:36,945 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:36,946 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:36,946 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:36,960 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:37,070 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:37,070 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-24 23:16:37,070 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:37,071 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-24 23:16:37,071 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-24 23:16:37,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-01-24 23:16:37,071 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 6 states. [2018-01-24 23:16:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:37,188 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2018-01-24 23:16:37,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-01-24 23:16:37,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2018-01-24 23:16:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:37,189 INFO L225 Difference]: With dead ends: 128 [2018-01-24 23:16:37,189 INFO L226 Difference]: Without dead ends: 99 [2018-01-24 23:16:37,189 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-01-24 23:16:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-24 23:16:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-01-24 23:16:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-01-24 23:16:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2018-01-24 23:16:37,198 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 31 [2018-01-24 23:16:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:37,199 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2018-01-24 23:16:37,199 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-24 23:16:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2018-01-24 23:16:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 23:16:37,200 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:37,200 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:37,200 INFO L371 AbstractCegarLoop]: === Iteration 12 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash -159580714, now seen corresponding path program 1 times [2018-01-24 23:16:37,201 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:37,202 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:37,202 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:37,202 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:37,202 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:37,225 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:37,407 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-24 23:16:37,407 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2018-01-24 23:16:37,407 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-24 23:16:37,407 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-01-24 23:16:37,408 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-01-24 23:16:37,408 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-01-24 23:16:37,408 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 13 states. [2018-01-24 23:16:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-24 23:16:37,679 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-01-24 23:16:37,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-24 23:16:37,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2018-01-24 23:16:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-24 23:16:37,681 INFO L225 Difference]: With dead ends: 197 [2018-01-24 23:16:37,681 INFO L226 Difference]: Without dead ends: 160 [2018-01-24 23:16:37,681 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-01-24 23:16:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-01-24 23:16:37,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2018-01-24 23:16:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-01-24 23:16:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2018-01-24 23:16:37,693 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 31 [2018-01-24 23:16:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-24 23:16:37,694 INFO L432 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2018-01-24 23:16:37,694 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-01-24 23:16:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2018-01-24 23:16:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-24 23:16:37,695 INFO L314 BasicCegarLoop]: Found error trace [2018-01-24 23:16:37,695 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-24 23:16:37,696 INFO L371 AbstractCegarLoop]: === Iteration 13 === [cstpncpyErr3RequiresViolation, cstpncpyErr10RequiresViolation, cstpncpyErr11RequiresViolation, cstpncpyErr7RequiresViolation, cstpncpyErr6RequiresViolation, cstpncpyErr2RequiresViolation, cstpncpyErr13RequiresViolation, cstpncpyErr15RequiresViolation, cstpncpyErr4RequiresViolation, cstpncpyErr5RequiresViolation, cstpncpyErr9RequiresViolation, cstpncpyErr0RequiresViolation, cstpncpyErr12RequiresViolation, cstpncpyErr17RequiresViolation, cstpncpyErr1RequiresViolation, cstpncpyErr8RequiresViolation, cstpncpyErr16RequiresViolation, cstpncpyErr14RequiresViolation, mainErr1RequiresViolation, mainErr2EnsuresViolation, mainErr0RequiresViolation]=== [2018-01-24 23:16:37,696 INFO L82 PathProgramCache]: Analyzing trace with hash -19032104, now seen corresponding path program 1 times [2018-01-24 23:16:37,696 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-24 23:16:37,697 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:37,697 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-24 23:16:37,697 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-24 23:16:37,697 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-24 23:16:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-24 23:16:37,720 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-24 23:16:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-24 23:16:37,993 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-24 23:16:37,993 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-24 23:16:37,993 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-01-24 23:16:37,995 INFO L201 CegarAbsIntRunner]: [0], [1], [5], [6], [9], [12], [13], [16], [17], [20], [23], [27], [28], [30], [31], [59], [61], [66], [80], [85], [91], [93], [94], [95], [96], [97], [108], [109], [110], [112] [2018-01-24 23:16:38,037 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-24 23:16:38,038 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown