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/mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dancing_true-unreach-call_false-valid-memtrack.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:58:18,426 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:58:18,428 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:58:18,443 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:58:18,443 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:58:18,444 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:58:18,445 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:58:18,447 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:58:18,449 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:58:18,450 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:58:18,451 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-01-21 00:58:18,472 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_imprecise.epf [2018-01-21 00:58:18,482 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:58:18,482 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:58:18,483 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:58:18,483 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:58:18,483 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:58:18,484 INFO L133 SettingsManager]: * Deactivate Weak Equivalences=true [2018-01-21 00:58:18,484 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:58:18,484 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:58:18,485 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:58:18,485 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:58:18,485 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:58:18,485 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:58:18,485 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:58:18,486 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:58:18,486 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:58:18,486 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:58:18,486 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:58:18,486 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:58:18,486 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:58:18,487 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:58:18,487 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:58:18,487 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:58:18,487 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:58:18,487 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:58:18,488 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:58:18,488 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:58:18,488 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:58:18,488 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:58:18,488 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:58:18,489 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:58:18,489 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:58:18,489 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:58:18,489 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:58:18,489 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:58:18,490 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:58:18,490 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:58:18,490 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:58:18,491 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:58:18,491 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:58:18,526 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:58:18,538 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:58:18,542 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:58:18,543 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:58:18,544 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:58:18,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dancing_true-unreach-call_false-valid-memtrack.i [2018-01-21 00:58:18,710 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:58:18,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:58:18,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:58:18,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:58:18,722 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:58:18,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68f8d5d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18, skipping insertion in model container [2018-01-21 00:58:18,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,745 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:58:18,789 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:58:18,902 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:58:18,922 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:58:18,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18 WrapperNode [2018-01-21 00:58:18,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:58:18,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:58:18,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:58:18,932 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:58:18,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (1/1) ... [2018-01-21 00:58:18,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:58:18,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:58:18,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:58:18,977 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:58:18,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (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 [2018-01-21 00:58:19,029 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:58:19,029 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:58:19,029 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-01-21 00:58:19,030 INFO L136 BoogieDeclarations]: Found implementation of procedure remove [2018-01-21 00:58:19,030 INFO L136 BoogieDeclarations]: Found implementation of procedure re_insert [2018-01-21 00:58:19,030 INFO L136 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2018-01-21 00:58:19,030 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:58:19,030 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:58:19,030 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:58:19,030 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:58:19,031 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:58:19,031 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:58:19,031 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2018-01-21 00:58:19,031 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2018-01-21 00:58:19,031 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 00:58:19,031 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-01-21 00:58:19,032 INFO L128 BoogieDeclarations]: Found specification of procedure remove [2018-01-21 00:58:19,032 INFO L128 BoogieDeclarations]: Found specification of procedure re_insert [2018-01-21 00:58:19,032 INFO L128 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2018-01-21 00:58:19,032 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:58:19,032 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:58:19,032 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:58:19,371 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:58:19,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:58:19 BoogieIcfgContainer [2018-01-21 00:58:19,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:58:19,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:58:19,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:58:19,375 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:58:19,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:58:18" (1/3) ... [2018-01-21 00:58:19,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb1c71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:58:19, skipping insertion in model container [2018-01-21 00:58:19,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:58:18" (2/3) ... [2018-01-21 00:58:19,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb1c71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:58:19, skipping insertion in model container [2018-01-21 00:58:19,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:58:19" (3/3) ... [2018-01-21 00:58:19,380 INFO L105 eAbstractionObserver]: Analyzing ICFG dancing_true-unreach-call_false-valid-memtrack.i [2018-01-21 00:58:19,389 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:58:19,395 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2018-01-21 00:58:19,432 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:58:19,432 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:58:19,433 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:58:19,433 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:58:19,433 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:58:19,433 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:58:19,433 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:58:19,433 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:58:19,434 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:58:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-21 00:58:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:58:19,463 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:19,464 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:58:19,464 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:58:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash 178905, now seen corresponding path program 1 times [2018-01-21 00:58:19,473 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:19,515 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:19,516 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:19,516 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:19,516 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:58:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:58:19,567 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:58:19,573 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:19,580 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:58:19,580 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:58:19,580 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:58:19,580 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:58:19,580 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:58:19,581 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:58:19,581 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:58:19,581 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == re_insertErr0EnsuresViolation======== [2018-01-21 00:58:19,581 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:58:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-21 00:58:19,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-01-21 00:58:19,585 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:19,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:58:19,586 INFO L371 AbstractCegarLoop]: === Iteration 1 === [re_insertErr0EnsuresViolation]=== [2018-01-21 00:58:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1611447727, now seen corresponding path program 1 times [2018-01-21 00:58:19,586 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:19,587 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:19,587 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:19,587 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:19,588 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:19,621 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:58:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:58:19,682 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:58:19,682 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:58:19,682 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:58:19,685 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:58:19,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:58:19,792 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:58:19,794 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 2 states. [2018-01-21 00:58:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:58:19,821 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2018-01-21 00:58:19,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:58:19,822 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 39 [2018-01-21 00:58:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:58:19,827 INFO L225 Difference]: With dead ends: 149 [2018-01-21 00:58:19,827 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 00:58:19,830 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:58:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 00:58:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 00:58:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 00:58:19,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 00:58:19,849 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2018-01-21 00:58:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:58:19,849 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 00:58:19,849 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:58:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 00:58:19,849 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 00:58:19,852 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:58:19,852 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:58:19,852 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:58:19,852 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:58:19,852 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:58:19,853 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:58:19,853 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:58:19,853 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:58:19,853 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:58:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-21 00:58:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-01-21 00:58:19,857 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:19,857 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:58:19,857 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:58:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash -715233718, now seen corresponding path program 1 times [2018-01-21 00:58:19,857 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:19,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:19,859 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:19,859 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:19,859 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:19,876 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:58:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:58:19,914 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:58:19,914 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:58:19,914 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:58:19,915 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:58:19,915 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:58:19,915 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:58:19,915 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 2 states. [2018-01-21 00:58:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:58:19,927 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2018-01-21 00:58:19,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:58:19,927 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 56 [2018-01-21 00:58:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:58:19,931 INFO L225 Difference]: With dead ends: 149 [2018-01-21 00:58:19,931 INFO L226 Difference]: Without dead ends: 78 [2018-01-21 00:58:19,932 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:58:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-01-21 00:58:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-01-21 00:58:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 00:58:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2018-01-21 00:58:19,954 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 56 [2018-01-21 00:58:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:58:19,955 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2018-01-21 00:58:19,955 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:58:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2018-01-21 00:58:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-01-21 00:58:19,959 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:19,959 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:58:19,959 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:58:19,959 INFO L82 PathProgramCache]: Analyzing trace with hash 675519653, now seen corresponding path program 1 times [2018-01-21 00:58:19,959 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:19,961 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:19,961 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:19,961 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:19,961 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:58:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:58:20,057 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:58:20,066 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,068 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,069 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,071 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,072 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,072 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,073 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,074 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,074 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:58:20,085 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:58:20,085 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:58:20,085 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:58:20,085 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:58:20,085 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:58:20,085 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:58:20,086 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:58:20,086 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:58:20,086 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:58:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2018-01-21 00:58:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-01-21 00:58:20,089 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:20,089 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:58:20,089 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:58:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1572438346, now seen corresponding path program 1 times [2018-01-21 00:58:20,090 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:20,091 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:20,091 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:20,091 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:20,091 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:20,102 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:58:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:58:20,123 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:58:20,123 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:58:20,124 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:58:20,124 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:58:20,124 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:58:20,124 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:58:20,125 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 2 states. [2018-01-21 00:58:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:58:20,134 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2018-01-21 00:58:20,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:58:20,134 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 54 [2018-01-21 00:58:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:58:20,136 INFO L225 Difference]: With dead ends: 149 [2018-01-21 00:58:20,136 INFO L226 Difference]: Without dead ends: 76 [2018-01-21 00:58:20,136 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:58:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-01-21 00:58:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-01-21 00:58:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-01-21 00:58:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2018-01-21 00:58:20,143 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 54 [2018-01-21 00:58:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:58:20,143 INFO L432 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2018-01-21 00:58:20,143 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:58:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2018-01-21 00:58:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-01-21 00:58:20,145 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:20,146 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:58:20,146 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 00:58:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash 362713701, now seen corresponding path program 1 times [2018-01-21 00:58:20,146 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:20,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:20,147 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:20,147 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:20,147 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:20,169 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:58:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:58:20,299 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:58:20,299 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 00:58:20,299 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:58:20,299 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:58:20,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:58:20,300 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:58:20,300 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 4 states. [2018-01-21 00:58:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:58:20,580 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2018-01-21 00:58:20,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:58:20,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2018-01-21 00:58:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:58:20,583 INFO L225 Difference]: With dead ends: 96 [2018-01-21 00:58:20,583 INFO L226 Difference]: Without dead ends: 79 [2018-01-21 00:58:20,584 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:58:20,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-01-21 00:58:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2018-01-21 00:58:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 00:58:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2018-01-21 00:58:20,594 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 55 [2018-01-21 00:58:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:58:20,594 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2018-01-21 00:58:20,594 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:58:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2018-01-21 00:58:20,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-01-21 00:58:20,597 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:20,597 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:58:20,597 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 00:58:20,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2096216182, now seen corresponding path program 1 times [2018-01-21 00:58:20,597 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:20,598 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:20,599 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:20,599 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:20,599 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:20,611 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:58:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:58:20,654 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:58:20,654 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-01-21 00:58:20,654 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:58:20,655 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 00:58:20,655 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 00:58:20,655 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-01-21 00:58:20,655 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 4 states. [2018-01-21 00:58:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:58:20,702 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2018-01-21 00:58:20,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 00:58:20,703 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2018-01-21 00:58:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:58:20,704 INFO L225 Difference]: With dead ends: 138 [2018-01-21 00:58:20,705 INFO L226 Difference]: Without dead ends: 80 [2018-01-21 00:58:20,705 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:58:20,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-01-21 00:58:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2018-01-21 00:58:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-01-21 00:58:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2018-01-21 00:58:20,715 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 58 [2018-01-21 00:58:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:58:20,715 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2018-01-21 00:58:20,715 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 00:58:20,715 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2018-01-21 00:58:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-21 00:58:20,716 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:20,716 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-01-21 00:58:20,716 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 00:58:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1351865632, now seen corresponding path program 1 times [2018-01-21 00:58:20,717 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:20,718 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:20,718 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:20,718 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:20,718 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:20,729 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:58:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-01-21 00:58:20,836 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:58:20,836 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:58:20,837 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 65 with the following transitions: [2018-01-21 00:58:20,838 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [11], [13], [14], [15], [20], [21], [22], [23], [26], [34], [36], [39], [46], [50], [51], [52], [54], [55], [58], [68], [70], [71], [80], [82], [91], [93], [95], [96], [98], [99], [107], [109], [117], [119], [125], [132], [134], [136], [137], [138], [139], [142], [143], [144], [145], [146], [147], [148], [149], [152], [153], [154] [2018-01-21 00:58:20,892 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:58:20,892 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:58:21,603 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 00:58:21,604 INFO L268 AbstractInterpreter]: Visited 57 different actions 131 times. Merged at 22 different actions 32 times. Never widened. Found 3 fixpoints after 3 different actions. Largest state had 29 variables. [2018-01-21 00:58:21,617 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 00:58:21,617 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:58:21,617 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/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 [2018-01-21 00:58:21,633 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:21,633 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:58:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:21,687 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:58:21,714 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 [2018-01-21 00:58:21,716 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-21 00:58:21,717 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:58:21,717 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-01-21 00:58:21,725 INFO L700 Elim1Store]: detected not equals via solver [2018-01-21 00:58:21,726 INFO L700 Elim1Store]: detected not equals via solver [2018-01-21 00:58:21,727 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-01-21 00:58:21,727 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-21 00:58:21,728 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:58:21,728 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-01-21 00:58:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 00:58:21,762 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:58:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:58:21,856 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:58:21,857 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:58:21,862 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:21,863 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:58:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:21,955 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:58:21,971 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 [2018-01-21 00:58:21,971 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-21 00:58:21,985 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:58:21,986 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-01-21 00:58:22,005 INFO L700 Elim1Store]: detected not equals via solver [2018-01-21 00:58:22,006 INFO L700 Elim1Store]: detected not equals via solver [2018-01-21 00:58:22,006 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-01-21 00:58:22,006 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-21 00:58:22,007 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:58:22,008 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2018-01-21 00:58:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-01-21 00:58:22,020 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:58:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:58:22,060 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 00:58:22,060 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7, 7, 7] total 10 [2018-01-21 00:58:22,060 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:58:22,061 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-21 00:58:22,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-21 00:58:22,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-01-21 00:58:22,061 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand 9 states. [2018-01-21 00:58:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:58:22,516 INFO L93 Difference]: Finished difference Result 163 states and 200 transitions. [2018-01-21 00:58:22,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-01-21 00:58:22,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 64 [2018-01-21 00:58:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:58:22,519 INFO L225 Difference]: With dead ends: 163 [2018-01-21 00:58:22,519 INFO L226 Difference]: Without dead ends: 106 [2018-01-21 00:58:22,520 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 248 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2018-01-21 00:58:22,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-01-21 00:58:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2018-01-21 00:58:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-01-21 00:58:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2018-01-21 00:58:22,538 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 64 [2018-01-21 00:58:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:58:22,539 INFO L432 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2018-01-21 00:58:22,539 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-21 00:58:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2018-01-21 00:58:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-01-21 00:58:22,540 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:58:22,541 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2018-01-21 00:58:22,541 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0EnsuresViolation]=== [2018-01-21 00:58:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash 998777250, now seen corresponding path program 1 times [2018-01-21 00:58:22,541 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:58:22,542 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:22,542 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:22,542 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:58:22,542 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:58:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:22,569 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:58:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:58:22,983 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:58:22,983 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:58:22,983 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 65 with the following transitions: [2018-01-21 00:58:22,984 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [11], [13], [14], [15], [20], [21], [22], [23], [28], [34], [36], [39], [46], [50], [51], [52], [54], [55], [58], [68], [70], [71], [80], [82], [91], [93], [95], [96], [98], [99], [107], [109], [117], [119], [125], [132], [134], [136], [137], [138], [139], [142], [143], [144], [145], [146], [147], [148], [149], [152], [153], [154] [2018-01-21 00:58:22,986 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:58:22,987 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:58:23,681 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 00:58:23,681 INFO L268 AbstractInterpreter]: Visited 57 different actions 168 times. Merged at 24 different actions 45 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 29 variables. [2018-01-21 00:58:23,686 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 00:58:23,686 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:58:23,686 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:58:23,698 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:23,698 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:58:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:58:23,732 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:58:23,882 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-01-21 00:58:23,885 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-01-21 00:58:23,885 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-21 00:58:23,887 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:58:23,892 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:58:23,893 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:18, output treesize:10 [2018-01-21 00:58:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:58:24,129 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:58:24,394 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2018-01-21 00:58:24,396 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 8 treesize of output 1 [2018-01-21 00:58:24,396 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-21 00:58:24,397 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:58:24,398 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2018-01-21 00:58:24,400 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 8 treesize of output 1 [2018-01-21 00:58:24,400 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-21 00:58:24,401 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:58:24,407 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-01-21 00:58:24,407 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:20, output treesize:11 [2018-01-21 00:58:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:58:24,438 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:58:24,438 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:58:24,444 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:58:24,445 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:58:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-01-21 00:58:36,530 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-01-21 00:58:36,530 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2018-01-21 00:58:36,530 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 00:58:36,531 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-01-21 00:58:36,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-01-21 00:58:36,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2018-01-21 00:58:36,531 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 21 states. [2018-01-21 00:59:14,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:59:14,356 INFO L93 Difference]: Finished difference Result 231 states and 281 transitions. [2018-01-21 00:59:14,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-21 00:59:14,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-01-21 00:59:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:59:14,359 INFO L225 Difference]: With dead ends: 231 [2018-01-21 00:59:14,359 INFO L226 Difference]: Without dead ends: 189 [2018-01-21 00:59:14,360 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=1633, Unknown=0, NotChecked=0, Total=1892 [2018-01-21 00:59:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-01-21 00:59:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 157. [2018-01-21 00:59:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-01-21 00:59:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 197 transitions. [2018-01-21 00:59:14,385 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 197 transitions. Word has length 64 [2018-01-21 00:59:14,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:59:14,385 INFO L432 AbstractCegarLoop]: Abstraction has 157 states and 197 transitions. [2018-01-21 00:59:14,385 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-01-21 00:59:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 197 transitions. [2018-01-21 00:59:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-01-21 00:59:14,387 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:59:14,387 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:59:14,387 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0EnsuresViolation]=== [2018-01-21 00:59:14,387 INFO L82 PathProgramCache]: Analyzing trace with hash 970429150, now seen corresponding path program 1 times [2018-01-21 00:59:14,387 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:59:14,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:59:14,388 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:59:14,388 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:59:14,388 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:59:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:59:14,414 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:59:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-01-21 00:59:15,207 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:59:15,207 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:59:15,207 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 69 with the following transitions: [2018-01-21 00:59:15,207 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [7], [11], [13], [14], [15], [20], [21], [22], [23], [28], [34], [36], [39], [46], [50], [51], [52], [54], [55], [58], [68], [70], [71], [74], [75], [76], [77], [78], [82], [91], [93], [95], [96], [98], [99], [107], [109], [117], [119], [125], [132], [134], [136], [137], [138], [139], [142], [143], [144], [145], [146], [147], [148], [149], [152], [153], [154] [2018-01-21 00:59:15,209 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:59:15,209 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 00:59:16,087 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 00:59:16,087 INFO L268 AbstractInterpreter]: Visited 61 different actions 180 times. Merged at 24 different actions 45 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 29 variables. [2018-01-21 00:59:16,108 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 00:59:16,108 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:59:16,108 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 00:59:16,120 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:59:16,120 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 00:59:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:59:16,160 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 00:59:16,170 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 [2018-01-21 00:59:16,171 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-21 00:59:16,173 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:59:16,173 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2018-01-21 00:59:16,228 INFO L700 Elim1Store]: detected not equals via solver [2018-01-21 00:59:16,229 INFO L700 Elim1Store]: detected not equals via solver [2018-01-21 00:59:16,230 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2018-01-21 00:59:16,231 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-01-21 00:59:16,237 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:59:16,238 INFO L202 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2018-01-21 00:59:16,351 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 10 [2018-01-21 00:59:16,352 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2018-01-21 00:59:16,353 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-21 00:59:16,354 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:59:16,359 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:59:16,359 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:22, output treesize:21 [2018-01-21 00:59:19,829 WARN L1029 $PredicateComparison]: unable to prove that (exists ((|remove_#t~mem4.base| Int) (|remove_#t~mem2.offset| Int)) (= |c_#memory_$Pointer$.base| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_remove_#in~x.base|) (+ |c_remove_#in~x.offset| 4)))) (store |c_old(#memory_$Pointer$.base)| .cse0 (store (select |c_old(#memory_$Pointer$.base)| .cse0) |remove_#t~mem2.offset| |remove_#t~mem4.base|))))) is different from true [2018-01-21 00:59:19,851 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2018-01-21 00:59:19,854 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 14 treesize of output 13 [2018-01-21 00:59:19,854 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-21 00:59:19,858 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:59:19,863 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:59:19,863 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:21 [2018-01-21 00:59:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 00:59:22,400 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 00:59:23,153 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2018-01-21 00:59:23,155 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 8 treesize of output 1 [2018-01-21 00:59:23,155 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-01-21 00:59:23,156 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:59:23,157 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2018-01-21 00:59:23,159 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 8 treesize of output 1 [2018-01-21 00:59:23,159 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-01-21 00:59:23,160 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-01-21 00:59:23,173 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 4 xjuncts. [2018-01-21 00:59:23,173 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:41, output treesize:15 [2018-01-21 00:59:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-01-21 00:59:23,461 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:59:23,461 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 00:59:23,464 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:59:23,464 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown