java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:00:57,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:00:57,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:00:57,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 18:00:57,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:00:57,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:00:57,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:00:57,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:00:57,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:00:57,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:00:57,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:00:57,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:00:57,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:00:57,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:00:57,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:00:57,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:00:57,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:00:57,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 18:00:57,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 18:00:57,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 18:00:57,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 18:00:57,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 18:00:57,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 18:00:57,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 18:00:57,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 18:00:57,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 18:00:57,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 18:00:57,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 18:00:57,598 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 18:00:57,613 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:00:57,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:00:57,613 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:00:57,614 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:00:57,614 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:00:57,614 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:00:57,615 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:00:57,615 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:00:57,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:00:57,615 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:00:57,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:00:57,618 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:00:57,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:00:57,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:00:57,619 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:00:57,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:00:57,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:00:57,620 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:00:57,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:00:57,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:00:57,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:00:57,621 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:00:57,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:00:57,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:00:57,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:00:57,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:00:57,622 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:00:57,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:00:57,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:00:57,623 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:00:57,662 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:00:57,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:00:57,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:00:57,680 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:00:57,681 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:00:57,682 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label48.c [2019-10-02 18:00:57,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e4d648b/c3af380d61d44f0b8adaa19570fec56c/FLAG923a03d0e [2019-10-02 18:00:58,451 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:00:58,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label48.c [2019-10-02 18:00:58,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e4d648b/c3af380d61d44f0b8adaa19570fec56c/FLAG923a03d0e [2019-10-02 18:00:58,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9e4d648b/c3af380d61d44f0b8adaa19570fec56c [2019-10-02 18:00:58,636 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:00:58,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:00:58,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:00:58,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:00:58,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:00:58,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:00:58" (1/1) ... [2019-10-02 18:00:58,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@661c4446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:00:58, skipping insertion in model container [2019-10-02 18:00:58,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:00:58" (1/1) ... [2019-10-02 18:00:58,656 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:00:58,753 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:00:59,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:00:59,581 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:01:00,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:01:00,043 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:01:00,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00 WrapperNode [2019-10-02 18:01:00,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:01:00,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:01:00,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:01:00,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:01:00,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (1/1) ... [2019-10-02 18:01:00,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (1/1) ... [2019-10-02 18:01:00,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (1/1) ... [2019-10-02 18:01:00,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (1/1) ... [2019-10-02 18:01:00,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (1/1) ... [2019-10-02 18:01:00,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (1/1) ... [2019-10-02 18:01:00,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (1/1) ... [2019-10-02 18:01:00,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:01:00,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:01:00,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:01:00,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:01:00,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (1/1) ... No working directory specified, using /storage/repos/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 [2019-10-02 18:01:00,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:01:00,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:01:00,307 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:01:00,307 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:01:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:01:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:01:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:01:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:01:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:01:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:01:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:01:02,269 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:01:02,269 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:01:02,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:01:02 BoogieIcfgContainer [2019-10-02 18:01:02,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:01:02,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:01:02,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:01:02,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:01:02,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:00:58" (1/3) ... [2019-10-02 18:01:02,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a419eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:01:02, skipping insertion in model container [2019-10-02 18:01:02,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:01:00" (2/3) ... [2019-10-02 18:01:02,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a419eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:01:02, skipping insertion in model container [2019-10-02 18:01:02,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:01:02" (3/3) ... [2019-10-02 18:01:02,280 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label48.c [2019-10-02 18:01:02,290 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:01:02,299 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:01:02,316 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:01:02,344 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:01:02,344 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:01:02,345 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:01:02,345 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:01:02,345 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:01:02,345 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:01:02,345 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:01:02,345 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:01:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-02 18:01:02,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-02 18:01:02,414 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:01:02,416 INFO L411 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, 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, 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, 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] [2019-10-02 18:01:02,421 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:01:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:01:02,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1739867384, now seen corresponding path program 1 times [2019-10-02 18:01:02,430 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:01:02,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:02,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:01:02,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:02,493 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:01:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:01:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:01:03,371 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:01:03,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 18:01:03,371 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:01:03,378 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 18:01:03,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 18:01:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:01:03,396 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2019-10-02 18:01:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:01:05,726 INFO L93 Difference]: Finished difference Result 749 states and 1187 transitions. [2019-10-02 18:01:05,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 18:01:05,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 189 [2019-10-02 18:01:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:01:05,759 INFO L225 Difference]: With dead ends: 749 [2019-10-02 18:01:05,759 INFO L226 Difference]: Without dead ends: 677 [2019-10-02 18:01:05,761 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:01:05,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2019-10-02 18:01:05,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 463. [2019-10-02 18:01:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-10-02 18:01:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 726 transitions. [2019-10-02 18:01:05,849 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 726 transitions. Word has length 189 [2019-10-02 18:01:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:01:05,850 INFO L475 AbstractCegarLoop]: Abstraction has 463 states and 726 transitions. [2019-10-02 18:01:05,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 18:01:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 726 transitions. [2019-10-02 18:01:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-02 18:01:05,855 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:01:05,855 INFO L411 BasicCegarLoop]: trace histogram [2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:01:05,856 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:01:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:01:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1270539508, now seen corresponding path program 1 times [2019-10-02 18:01:05,857 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:01:05,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:05,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:01:05,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:05,859 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:01:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:01:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:01:06,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:01:06,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 18:01:06,205 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:01:06,207 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 18:01:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 18:01:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:01:06,208 INFO L87 Difference]: Start difference. First operand 463 states and 726 transitions. Second operand 3 states. [2019-10-02 18:01:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:01:07,403 INFO L93 Difference]: Finished difference Result 890 states and 1307 transitions. [2019-10-02 18:01:07,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 18:01:07,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2019-10-02 18:01:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:01:07,420 INFO L225 Difference]: With dead ends: 890 [2019-10-02 18:01:07,421 INFO L226 Difference]: Without dead ends: 890 [2019-10-02 18:01:07,424 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:01:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2019-10-02 18:01:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 889. [2019-10-02 18:01:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2019-10-02 18:01:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1305 transitions. [2019-10-02 18:01:07,499 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1305 transitions. Word has length 201 [2019-10-02 18:01:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:01:07,501 INFO L475 AbstractCegarLoop]: Abstraction has 889 states and 1305 transitions. [2019-10-02 18:01:07,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 18:01:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1305 transitions. [2019-10-02 18:01:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-02 18:01:07,508 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:01:07,508 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:01:07,509 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:01:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:01:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash 940059888, now seen corresponding path program 1 times [2019-10-02 18:01:07,510 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:01:07,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:07,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:01:07,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:07,514 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:01:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:01:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:01:07,756 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:01:07,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 18:01:07,756 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:01:07,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 18:01:07,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 18:01:07,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:01:07,758 INFO L87 Difference]: Start difference. First operand 889 states and 1305 transitions. Second operand 3 states. [2019-10-02 18:01:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:01:09,006 INFO L93 Difference]: Finished difference Result 1735 states and 2543 transitions. [2019-10-02 18:01:09,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 18:01:09,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 203 [2019-10-02 18:01:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:01:09,019 INFO L225 Difference]: With dead ends: 1735 [2019-10-02 18:01:09,019 INFO L226 Difference]: Without dead ends: 1735 [2019-10-02 18:01:09,019 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:01:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2019-10-02 18:01:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1718. [2019-10-02 18:01:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2019-10-02 18:01:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2510 transitions. [2019-10-02 18:01:09,080 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2510 transitions. Word has length 203 [2019-10-02 18:01:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:01:09,083 INFO L475 AbstractCegarLoop]: Abstraction has 1718 states and 2510 transitions. [2019-10-02 18:01:09,083 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 18:01:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2510 transitions. [2019-10-02 18:01:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-02 18:01:09,090 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:01:09,090 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:01:09,091 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:01:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:01:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2138348213, now seen corresponding path program 1 times [2019-10-02 18:01:09,092 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:01:09,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:09,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:01:09,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:09,094 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:01:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:01:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:01:09,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:01:09,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:01:09,311 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:01:09,312 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:01:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:01:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:01:09,313 INFO L87 Difference]: Start difference. First operand 1718 states and 2510 transitions. Second operand 6 states. [2019-10-02 18:01:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:01:11,054 INFO L93 Difference]: Finished difference Result 3531 states and 5828 transitions. [2019-10-02 18:01:11,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 18:01:11,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 206 [2019-10-02 18:01:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:01:11,089 INFO L225 Difference]: With dead ends: 3531 [2019-10-02 18:01:11,089 INFO L226 Difference]: Without dead ends: 3531 [2019-10-02 18:01:11,090 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 18:01:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2019-10-02 18:01:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 3437. [2019-10-02 18:01:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3437 states. [2019-10-02 18:01:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 5136 transitions. [2019-10-02 18:01:11,223 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 5136 transitions. Word has length 206 [2019-10-02 18:01:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:01:11,223 INFO L475 AbstractCegarLoop]: Abstraction has 3437 states and 5136 transitions. [2019-10-02 18:01:11,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:01:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 5136 transitions. [2019-10-02 18:01:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-10-02 18:01:11,236 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:01:11,236 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:01:11,236 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:01:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:01:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash 284519507, now seen corresponding path program 1 times [2019-10-02 18:01:11,237 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:01:11,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:11,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:01:11,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:01:11,239 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:01:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:01:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:01:11,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:01:11,399 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:01:11,400 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 221 with the following transitions: [2019-10-02 18:01:11,404 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [13], [17], [21], [25], [29], [33], [36], [37], [41], [45], [48], [49], [53], [57], [61], [65], [76], [80], [84], [88], [92], [96], [100], [104], [108], [112], [116], [120], [124], [128], [132], [136], [140], [144], [148], [159], [163], [167], [171], [175], [179], [183], [187], [191], [202], [206], [210], [221], [225], [229], [233], [237], [241], [245], [249], [253], [257], [261], [265], [269], [273], [277], [281], [285], [289], [293], [297], [308], [312], [323], [327], [331], [335], [339], [343], [347], [351], [355], [359], [363], [367], [371], [375], [379], [383], [394], [398], [402], [406], [417], [421], [425], [429], [433], [437], [441], [445], [449], [453], [457], [461], [472], [476], [480], [484], [488], [492], [496], [500], [504], [508], [512], [516], [520], [524], [528], [532], [536], [540], [551], [555], [559], [570], [574], [585], [589], [593], [597], [601], [605], [609], [613], [624], [635], [646], [650], [654], [658], [662], [666], [673], [681], [689], [697], [705], [713], [721], [729], [737], [745], [753], [761], [769], [777], [785], [793], [801], [809], [817], [825], [833], [841], [849], [857], [865], [873], [881], [889], [897], [905], [913], [921], [929], [937], [945], [953], [961], [969], [977], [981], [983], [1157], [1161], [1170], [1174], [1176], [1181], [1182], [1183], [1185], [1186] [2019-10-02 18:01:11,522 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:01:11,522 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)