/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/array-crafted/xor2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:55:00,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:55:00,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:55:00,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:55:00,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:55:00,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:55:00,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:55:00,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:55:00,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:55:00,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:55:00,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:55:00,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:55:00,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:55:00,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:55:00,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:55:00,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:55:00,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:55:00,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:55:00,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:55:00,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:55:00,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:55:00,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:55:00,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:55:00,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:55:00,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:55:00,526 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 [2019-11-23 22:55:00,544 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:55:00,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:55:00,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:55:00,545 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:55:00,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:55:00,545 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:55:00,545 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:55:00,546 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:55:00,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:55:00,546 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:55:00,546 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:55:00,546 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:55:00,547 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:55:00,547 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:55:00,547 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:55:00,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:55:00,548 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:55:00,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:55:00,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:55:00,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:55:00,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:55:00,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:55:00,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:55:00,549 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:55:00,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:55:00,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:55:00,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:55:00,550 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:55:00,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:55:00,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:55:00,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:55:00,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:55:00,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:55:00,551 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:55:00,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:55:00,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:55:00,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:55:00,552 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:55:00,828 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:55:00,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:55:00,844 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:55:00,845 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:55:00,846 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:55:00,846 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor2.i [2019-11-23 22:55:00,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02cf306/95bdb2d2157b47bf8f45301abe009405/FLAG7cd987172 [2019-11-23 22:55:01,347 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:55:01,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor2.i [2019-11-23 22:55:01,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02cf306/95bdb2d2157b47bf8f45301abe009405/FLAG7cd987172 [2019-11-23 22:55:01,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c02cf306/95bdb2d2157b47bf8f45301abe009405 [2019-11-23 22:55:01,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:55:01,762 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:55:01,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:55:01,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:55:01,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:55:01,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75923a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:01, skipping insertion in model container [2019-11-23 22:55:01,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:55:01" (1/1) ... [2019-11-23 22:55:01,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:55:01,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:55:02,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:55:02,043 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:55:02,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:55:02,079 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:55:02,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02 WrapperNode [2019-11-23 22:55:02,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:55:02,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:55:02,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:55:02,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:55:02,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:55:02,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:55:02,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:55:02,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:55:02,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (1/1) ... [2019-11-23 22:55:02,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:55:02,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:55:02,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:55:02,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:55:02,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (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 [2019-11-23 22:55:02,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:55:02,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:55:02,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:55:02,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:55:02,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:55:02,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:55:02,808 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:55:02,808 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:55:02,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:55:02 BoogieIcfgContainer [2019-11-23 22:55:02,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:55:02,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:55:02,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:55:02,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:55:02,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:55:01" (1/3) ... [2019-11-23 22:55:02,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f09577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:55:02, skipping insertion in model container [2019-11-23 22:55:02,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:55:02" (2/3) ... [2019-11-23 22:55:02,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f09577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:55:02, skipping insertion in model container [2019-11-23 22:55:02,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:55:02" (3/3) ... [2019-11-23 22:55:02,818 INFO L109 eAbstractionObserver]: Analyzing ICFG xor2.i [2019-11-23 22:55:02,831 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:55:02,839 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:55:02,850 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:55:02,872 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:55:02,872 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:55:02,872 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:55:02,872 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:55:02,872 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:55:02,872 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:55:02,872 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:55:02,873 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:55:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-23 22:55:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:55:02,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:55:02,892 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:55:02,893 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:55:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:55:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash -977729615, now seen corresponding path program 1 times [2019-11-23 22:55:02,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:55:02,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496885656] [2019-11-23 22:55:02,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:55:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:55:03,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496885656] [2019-11-23 22:55:03,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:55:03,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:55:03,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655966215] [2019-11-23 22:55:03,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:55:03,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:55:03,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:55:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:55:03,071 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-23 22:55:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:55:03,106 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-23 22:55:03,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:55:03,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:55:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:55:03,119 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:55:03,120 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:55:03,123 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 [2019-11-23 22:55:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:55:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:55:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:55:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-23 22:55:03,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-23 22:55:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:55:03,162 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-23 22:55:03,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:55:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-23 22:55:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:55:03,163 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:55:03,163 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:55:03,164 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:55:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:55:03,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1165895748, now seen corresponding path program 1 times [2019-11-23 22:55:03,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:55:03,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399667835] [2019-11-23 22:55:03,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:55:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:55:03,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399667835] [2019-11-23 22:55:03,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069823374] [2019-11-23 22:55:03,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:03,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:55:03,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:55:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:55:03,378 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:55:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:55:03,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:55:03,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:55:03,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512627168] [2019-11-23 22:55:03,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:55:03,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:55:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:55:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:55:03,403 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-23 22:55:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:55:03,453 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-23 22:55:03,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:55:03,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:55:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:55:03,455 INFO L225 Difference]: With dead ends: 22 [2019-11-23 22:55:03,455 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 22:55:03,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:55:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 22:55:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 22:55:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:55:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-23 22:55:03,461 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-23 22:55:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:55:03,462 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-23 22:55:03,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:55:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-23 22:55:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 22:55:03,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:55:03,463 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:55:03,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:03,667 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:55:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:55:03,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1510942468, now seen corresponding path program 1 times [2019-11-23 22:55:03,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:55:03,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384663027] [2019-11-23 22:55:03,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:55:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:55:03,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384663027] [2019-11-23 22:55:03,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673531648] [2019-11-23 22:55:03,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:03,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 22:55:03,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:55:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:55:03,817 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:55:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 22:55:03,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:55:03,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-23 22:55:03,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577043361] [2019-11-23 22:55:03,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:55:03,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:55:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:55:03,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:55:03,834 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-23 22:55:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:55:03,853 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-23 22:55:03,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:55:03,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 22:55:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:55:03,855 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:55:03,855 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 22:55:03,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:55:03,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 22:55:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 22:55:03,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 22:55:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-23 22:55:03,877 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-23 22:55:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:55:03,878 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-23 22:55:03,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:55:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-23 22:55:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:55:03,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:55:03,879 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:55:04,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:04,092 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:55:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:55:04,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1316778556, now seen corresponding path program 1 times [2019-11-23 22:55:04,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:55:04,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240923668] [2019-11-23 22:55:04,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:55:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:55:04,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240923668] [2019-11-23 22:55:04,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508584054] [2019-11-23 22:55:04,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:55:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:55:04,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:55:04,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:55:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:55:04,236 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:55:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:55:04,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [881278213] [2019-11-23 22:55:04,289 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-23 22:55:04,289 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:55:04,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:55:04,303 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:55:04,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:55:41,362 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-23 22:55:41,573 WARN L192 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 259 [2019-11-23 22:55:41,804 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 259 [2019-11-23 22:55:41,983 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 260 [2019-11-23 22:55:49,407 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 286 [2019-11-23 22:56:04,250 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 313 [2019-11-23 22:56:06,833 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2019-11-23 22:56:07,137 WARN L192 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 317 [2019-11-23 22:56:07,422 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2019-11-23 22:56:07,647 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2019-11-23 22:56:12,559 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2019-11-23 22:56:12,833 WARN L192 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 326 [2019-11-23 22:56:16,670 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2019-11-23 22:56:19,228 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 331 [2019-11-23 22:56:24,088 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 343 [2019-11-23 22:56:24,203 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 339 [2019-11-23 22:56:26,657 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 342 [2019-11-23 22:56:29,290 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 344 [2019-11-23 22:56:29,526 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 347