/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:39:35,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:39:35,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:39:35,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:39:35,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:39:35,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:39:35,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:39:35,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:39:35,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:39:35,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:39:35,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:39:35,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:39:35,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:39:35,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:39:35,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:39:35,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:39:35,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:39:35,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:39:35,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:39:35,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:39:35,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:39:35,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:39:35,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:39:35,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:39:35,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:39:35,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:39:35,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:39:35,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:39:35,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:39:35,689 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:39:35,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:39:35,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:39:35,691 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:39:35,691 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:39:35,692 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:39:35,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:39:35,692 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:39:35,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:39:35,692 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:39:35,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:39:35,693 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:39:35,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:39:35,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:39:35,693 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:39:35,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:39:35,695 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:39:35,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:39:35,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:39:35,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:39:35,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:39:35,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:39:35,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:39:35,696 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:39:35,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:39:35,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:39:35,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:39:35,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:39:35,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:39:35,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:39:35,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:39:35,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:39:35,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:39:35,698 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:39:35,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:39:35,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:39:35,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:39:35,699 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:39:35,978 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:39:35,999 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:39:36,002 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:39:36,003 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:39:36,004 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:39:36,004 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c [2019-11-24 04:39:36,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2af975274/5f085f23f8e8412185b9804821cb348d/FLAG58faf0b1c [2019-11-24 04:39:36,696 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:39:36,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec1_product30.cil.c [2019-11-24 04:39:36,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2af975274/5f085f23f8e8412185b9804821cb348d/FLAG58faf0b1c [2019-11-24 04:39:36,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2af975274/5f085f23f8e8412185b9804821cb348d [2019-11-24 04:39:36,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:39:36,951 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:39:36,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:39:36,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:39:36,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:39:36,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:39:36" (1/1) ... [2019-11-24 04:39:36,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5392c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:36, skipping insertion in model container [2019-11-24 04:39:36,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:39:36" (1/1) ... [2019-11-24 04:39:36,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:39:37,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:39:37,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:39:37,727 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:39:37,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:39:37,987 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:39:37,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37 WrapperNode [2019-11-24 04:39:37,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:39:37,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:39:37,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:39:37,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:39:37,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:39:38,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:39:38,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:39:38,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:39:38,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (1/1) ... [2019-11-24 04:39:38,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:39:38,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:39:38,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:39:38,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:39:38,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (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 [2019-11-24 04:39:39,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:39:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:39:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:39:39,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:40:38,716 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:40:38,716 INFO L284 CfgBuilder]: Removed 1529 assume(true) statements. [2019-11-24 04:40:38,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:40:38 BoogieIcfgContainer [2019-11-24 04:40:38,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:40:38,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:40:38,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:40:38,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:40:38,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:39:36" (1/3) ... [2019-11-24 04:40:38,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeaef12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:40:38, skipping insertion in model container [2019-11-24 04:40:38,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:39:37" (2/3) ... [2019-11-24 04:40:38,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeaef12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:40:38, skipping insertion in model container [2019-11-24 04:40:38,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:40:38" (3/3) ... [2019-11-24 04:40:38,726 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product30.cil.c [2019-11-24 04:40:38,735 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:40:38,746 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-24 04:40:38,756 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-24 04:40:38,791 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:40:38,791 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:40:38,791 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:40:38,791 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:40:38,791 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:40:38,792 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:40:38,792 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:40:38,792 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:40:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states. [2019-11-24 04:40:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:40:38,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:38,853 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:40:38,853 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:38,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:38,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1443797132, now seen corresponding path program 1 times [2019-11-24 04:40:38,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:38,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873537305] [2019-11-24 04:40:38,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:39,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873537305] [2019-11-24 04:40:39,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:39,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:40:39,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41235177] [2019-11-24 04:40:39,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:40:39,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:39,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:40:39,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:40:39,318 INFO L87 Difference]: Start difference. First operand 2417 states. Second operand 2 states. [2019-11-24 04:40:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:39,456 INFO L93 Difference]: Finished difference Result 2434 states and 4707 transitions. [2019-11-24 04:40:39,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:40:39,458 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-24 04:40:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:39,506 INFO L225 Difference]: With dead ends: 2434 [2019-11-24 04:40:39,506 INFO L226 Difference]: Without dead ends: 2415 [2019-11-24 04:40:39,511 INFO L630 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 [2019-11-24 04:40:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2019-11-24 04:40:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2415. [2019-11-24 04:40:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2415 states. [2019-11-24 04:40:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4677 transitions. [2019-11-24 04:40:39,669 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4677 transitions. Word has length 12 [2019-11-24 04:40:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:39,669 INFO L462 AbstractCegarLoop]: Abstraction has 2415 states and 4677 transitions. [2019-11-24 04:40:39,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:40:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4677 transitions. [2019-11-24 04:40:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 04:40:39,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:39,673 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:40:39,674 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:39,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:39,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1751208858, now seen corresponding path program 1 times [2019-11-24 04:40:39,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:39,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737764846] [2019-11-24 04:40:39,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:39,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737764846] [2019-11-24 04:40:39,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:39,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:40:39,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002221194] [2019-11-24 04:40:39,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:40:39,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:39,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:40:39,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:40:39,839 INFO L87 Difference]: Start difference. First operand 2415 states and 4677 transitions. Second operand 3 states. [2019-11-24 04:40:39,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:39,979 INFO L93 Difference]: Finished difference Result 3639 states and 7042 transitions. [2019-11-24 04:40:39,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:40:39,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 04:40:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:39,995 INFO L225 Difference]: With dead ends: 3639 [2019-11-24 04:40:39,995 INFO L226 Difference]: Without dead ends: 2411 [2019-11-24 04:40:40,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:40:40,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2019-11-24 04:40:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2411. [2019-11-24 04:40:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2411 states. [2019-11-24 04:40:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 4669 transitions. [2019-11-24 04:40:40,087 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 4669 transitions. Word has length 13 [2019-11-24 04:40:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:40,088 INFO L462 AbstractCegarLoop]: Abstraction has 2411 states and 4669 transitions. [2019-11-24 04:40:40,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:40:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 4669 transitions. [2019-11-24 04:40:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:40:40,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:40,091 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:40:40,092 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash 254046397, now seen corresponding path program 1 times [2019-11-24 04:40:40,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:40,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985284931] [2019-11-24 04:40:40,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:40,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985284931] [2019-11-24 04:40:40,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:40,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:40:40,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550376501] [2019-11-24 04:40:40,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:40:40,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:40,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:40:40,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:40:40,208 INFO L87 Difference]: Start difference. First operand 2411 states and 4669 transitions. Second operand 4 states. [2019-11-24 04:40:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:43,065 INFO L93 Difference]: Finished difference Result 6185 states and 11921 transitions. [2019-11-24 04:40:43,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:40:43,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 04:40:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:43,091 INFO L225 Difference]: With dead ends: 6185 [2019-11-24 04:40:43,092 INFO L226 Difference]: Without dead ends: 4252 [2019-11-24 04:40:43,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:40:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2019-11-24 04:40:43,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 2825. [2019-11-24 04:40:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2825 states. [2019-11-24 04:40:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 5208 transitions. [2019-11-24 04:40:43,208 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 5208 transitions. Word has length 15 [2019-11-24 04:40:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:43,208 INFO L462 AbstractCegarLoop]: Abstraction has 2825 states and 5208 transitions. [2019-11-24 04:40:43,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:40:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 5208 transitions. [2019-11-24 04:40:43,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:40:43,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:43,211 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:40:43,211 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:43,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:43,212 INFO L82 PathProgramCache]: Analyzing trace with hash 700415726, now seen corresponding path program 1 times [2019-11-24 04:40:43,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:43,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733011085] [2019-11-24 04:40:43,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:43,342 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733011085] [2019-11-24 04:40:43,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:43,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:40:43,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214631393] [2019-11-24 04:40:43,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:40:43,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:40:43,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:40:43,345 INFO L87 Difference]: Start difference. First operand 2825 states and 5208 transitions. Second operand 3 states. [2019-11-24 04:40:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:43,953 INFO L93 Difference]: Finished difference Result 5763 states and 10693 transitions. [2019-11-24 04:40:43,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:40:43,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 04:40:43,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:43,973 INFO L225 Difference]: With dead ends: 5763 [2019-11-24 04:40:43,974 INFO L226 Difference]: Without dead ends: 3755 [2019-11-24 04:40:43,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:40:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2019-11-24 04:40:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3742. [2019-11-24 04:40:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3742 states. [2019-11-24 04:40:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 6924 transitions. [2019-11-24 04:40:46,727 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 6924 transitions. Word has length 17 [2019-11-24 04:40:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:46,728 INFO L462 AbstractCegarLoop]: Abstraction has 3742 states and 6924 transitions. [2019-11-24 04:40:46,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:40:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 6924 transitions. [2019-11-24 04:40:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 04:40:46,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:46,731 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:40:46,732 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 160827685, now seen corresponding path program 1 times [2019-11-24 04:40:46,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:46,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109124755] [2019-11-24 04:40:46,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:46,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109124755] [2019-11-24 04:40:46,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:46,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:40:46,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740256816] [2019-11-24 04:40:46,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:40:46,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:46,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:40:46,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:40:46,851 INFO L87 Difference]: Start difference. First operand 3742 states and 6924 transitions. Second operand 4 states. [2019-11-24 04:40:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:47,278 INFO L93 Difference]: Finished difference Result 6671 states and 12386 transitions. [2019-11-24 04:40:47,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:40:47,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-24 04:40:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:47,297 INFO L225 Difference]: With dead ends: 6671 [2019-11-24 04:40:47,298 INFO L226 Difference]: Without dead ends: 3331 [2019-11-24 04:40:47,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:40:47,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2019-11-24 04:40:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 3061. [2019-11-24 04:40:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3061 states. [2019-11-24 04:40:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 5682 transitions. [2019-11-24 04:40:47,418 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 5682 transitions. Word has length 21 [2019-11-24 04:40:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:47,418 INFO L462 AbstractCegarLoop]: Abstraction has 3061 states and 5682 transitions. [2019-11-24 04:40:47,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:40:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 5682 transitions. [2019-11-24 04:40:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-24 04:40:47,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:47,420 INFO L410 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] [2019-11-24 04:40:47,420 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:47,421 INFO L82 PathProgramCache]: Analyzing trace with hash 72574065, now seen corresponding path program 1 times [2019-11-24 04:40:47,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:47,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228586449] [2019-11-24 04:40:47,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:47,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228586449] [2019-11-24 04:40:47,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:47,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:40:47,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620895851] [2019-11-24 04:40:47,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:40:47,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:47,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:40:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:40:47,531 INFO L87 Difference]: Start difference. First operand 3061 states and 5682 transitions. Second operand 5 states. [2019-11-24 04:40:48,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:48,255 INFO L93 Difference]: Finished difference Result 6098 states and 11302 transitions. [2019-11-24 04:40:48,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:40:48,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-24 04:40:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:48,275 INFO L225 Difference]: With dead ends: 6098 [2019-11-24 04:40:48,275 INFO L226 Difference]: Without dead ends: 3767 [2019-11-24 04:40:48,280 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:40:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2019-11-24 04:40:48,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3091. [2019-11-24 04:40:48,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3091 states. [2019-11-24 04:40:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 5709 transitions. [2019-11-24 04:40:48,400 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 5709 transitions. Word has length 22 [2019-11-24 04:40:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:48,401 INFO L462 AbstractCegarLoop]: Abstraction has 3091 states and 5709 transitions. [2019-11-24 04:40:48,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:40:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 5709 transitions. [2019-11-24 04:40:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-24 04:40:48,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:48,403 INFO L410 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] [2019-11-24 04:40:48,403 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash 156713308, now seen corresponding path program 1 times [2019-11-24 04:40:48,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:48,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585926165] [2019-11-24 04:40:48,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:48,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585926165] [2019-11-24 04:40:48,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:48,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:40:48,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792336800] [2019-11-24 04:40:48,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:40:48,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:48,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:40:48,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:40:48,540 INFO L87 Difference]: Start difference. First operand 3091 states and 5709 transitions. Second operand 3 states. [2019-11-24 04:40:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:48,736 INFO L93 Difference]: Finished difference Result 7753 states and 14436 transitions. [2019-11-24 04:40:48,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:40:48,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-24 04:40:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:48,786 INFO L225 Difference]: With dead ends: 7753 [2019-11-24 04:40:48,790 INFO L226 Difference]: Without dead ends: 5419 [2019-11-24 04:40:48,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:40:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5419 states. [2019-11-24 04:40:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5419 to 5419. [2019-11-24 04:40:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5419 states. [2019-11-24 04:40:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 10068 transitions. [2019-11-24 04:40:49,003 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 10068 transitions. Word has length 27 [2019-11-24 04:40:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:49,004 INFO L462 AbstractCegarLoop]: Abstraction has 5419 states and 10068 transitions. [2019-11-24 04:40:49,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:40:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 10068 transitions. [2019-11-24 04:40:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-24 04:40:49,006 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:49,006 INFO L410 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] [2019-11-24 04:40:49,007 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:49,007 INFO L82 PathProgramCache]: Analyzing trace with hash 563184411, now seen corresponding path program 1 times [2019-11-24 04:40:49,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:49,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021538050] [2019-11-24 04:40:49,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:49,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021538050] [2019-11-24 04:40:49,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:49,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:40:49,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92419995] [2019-11-24 04:40:49,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:40:49,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:40:49,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:40:49,189 INFO L87 Difference]: Start difference. First operand 5419 states and 10068 transitions. Second operand 5 states. [2019-11-24 04:40:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:49,422 INFO L93 Difference]: Finished difference Result 8665 states and 16096 transitions. [2019-11-24 04:40:49,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:40:49,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-24 04:40:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:49,448 INFO L225 Difference]: With dead ends: 8665 [2019-11-24 04:40:49,448 INFO L226 Difference]: Without dead ends: 8650 [2019-11-24 04:40:49,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:40:49,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8650 states. [2019-11-24 04:40:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8650 to 5425. [2019-11-24 04:40:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5425 states. [2019-11-24 04:40:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 10074 transitions. [2019-11-24 04:40:49,673 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 10074 transitions. Word has length 28 [2019-11-24 04:40:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:49,673 INFO L462 AbstractCegarLoop]: Abstraction has 5425 states and 10074 transitions. [2019-11-24 04:40:49,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:40:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 10074 transitions. [2019-11-24 04:40:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-24 04:40:49,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:49,675 INFO L410 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] [2019-11-24 04:40:49,676 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1245104154, now seen corresponding path program 1 times [2019-11-24 04:40:49,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:49,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441602326] [2019-11-24 04:40:49,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:49,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441602326] [2019-11-24 04:40:49,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:49,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:40:49,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247346797] [2019-11-24 04:40:49,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:40:49,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:40:49,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:40:49,795 INFO L87 Difference]: Start difference. First operand 5425 states and 10074 transitions. Second operand 4 states. [2019-11-24 04:40:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:40:50,148 INFO L93 Difference]: Finished difference Result 8764 states and 16219 transitions. [2019-11-24 04:40:50,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:40:50,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-11-24 04:40:50,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:40:50,172 INFO L225 Difference]: With dead ends: 8764 [2019-11-24 04:40:50,172 INFO L226 Difference]: Without dead ends: 8749 [2019-11-24 04:40:50,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:40:50,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8749 states. [2019-11-24 04:40:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8749 to 5514. [2019-11-24 04:40:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5514 states. [2019-11-24 04:40:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 10202 transitions. [2019-11-24 04:40:50,428 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 10202 transitions. Word has length 29 [2019-11-24 04:40:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:40:50,429 INFO L462 AbstractCegarLoop]: Abstraction has 5514 states and 10202 transitions. [2019-11-24 04:40:50,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:40:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 10202 transitions. [2019-11-24 04:40:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-24 04:40:50,434 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:40:50,434 INFO L410 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] [2019-11-24 04:40:50,434 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:40:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:40:50,435 INFO L82 PathProgramCache]: Analyzing trace with hash -162377046, now seen corresponding path program 1 times [2019-11-24 04:40:50,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:40:50,435 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110564174] [2019-11-24 04:40:50,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:40:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:40:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:40:51,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110564174] [2019-11-24 04:40:51,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:40:51,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:40:51,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485868081] [2019-11-24 04:40:51,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:40:51,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:40:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:40:51,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:40:51,085 INFO L87 Difference]: Start difference. First operand 5514 states and 10202 transitions. Second operand 4 states.