/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/zero_sum_const1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:56:39,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:56:39,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:56:39,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:56:39,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:56:39,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:56:39,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:56:39,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:56:39,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:56:39,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:56:39,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:56:39,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:56:39,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:56:39,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:56:39,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:56:39,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:56:39,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:56:39,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:56:39,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:56:39,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:56:39,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:56:39,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:56:39,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:56:39,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:56:39,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:56:39,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:56:39,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:56:39,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:56:39,866 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 22:56:39,887 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:56:39,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:56:39,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:56:39,889 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:56:39,890 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:56:39,890 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:56:39,890 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:56:39,890 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:56:39,890 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:56:39,891 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:56:39,891 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:56:39,891 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:56:39,891 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:56:39,891 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:56:39,892 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:56:39,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:56:39,895 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:56:39,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:56:39,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:56:39,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:56:39,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:56:39,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:56:39,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:56:39,897 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:56:39,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:56:39,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:56:39,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:56:39,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:56:39,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:56:39,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:56:39,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:56:39,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:56:39,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:56:39,900 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:56:39,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:56:39,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:56:39,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:56:39,901 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:56:40,201 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:56:40,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:56:40,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:56:40,229 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:56:40,230 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:56:40,230 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2019-11-23 22:56:40,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dad02170f/71c99e3603d843cd9824999a3d2a9b66/FLAGb402982cf [2019-11-23 22:56:40,772 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:56:40,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2019-11-23 22:56:40,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dad02170f/71c99e3603d843cd9824999a3d2a9b66/FLAGb402982cf [2019-11-23 22:56:41,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dad02170f/71c99e3603d843cd9824999a3d2a9b66 [2019-11-23 22:56:41,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:56:41,158 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:56:41,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:41,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:56:41,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:56:41,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f8565c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41, skipping insertion in model container [2019-11-23 22:56:41,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:56:41,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:56:41,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:41,400 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:56:41,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:56:41,430 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:56:41,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41 WrapperNode [2019-11-23 22:56:41,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:56:41,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:41,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:56:41,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:56:41,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:56:41,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:56:41,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:56:41,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:56:41,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (1/1) ... [2019-11-23 22:56:41,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:56:41,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:56:41,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:56:41,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:56:41,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (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 22:56:41,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:56:41,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:56:41,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:56:41,975 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:56:41,976 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 22:56:41,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:41 BoogieIcfgContainer [2019-11-23 22:56:41,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:56:41,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:56:41,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:56:41,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:56:41,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:56:41" (1/3) ... [2019-11-23 22:56:41,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a619c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:41, skipping insertion in model container [2019-11-23 22:56:41,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:56:41" (2/3) ... [2019-11-23 22:56:41,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a619c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:56:41, skipping insertion in model container [2019-11-23 22:56:41,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:56:41" (3/3) ... [2019-11-23 22:56:42,000 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2019-11-23 22:56:42,012 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:56:42,019 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:56:42,036 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:56:42,059 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:56:42,060 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:56:42,060 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:56:42,060 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:56:42,060 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:56:42,060 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:56:42,061 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:56:42,061 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:56:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-23 22:56:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-23 22:56:42,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:42,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:42,083 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:42,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1371841819, now seen corresponding path program 1 times [2019-11-23 22:56:42,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:42,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415230470] [2019-11-23 22:56:42,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:42,303 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 22:56:42,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415230470] [2019-11-23 22:56:42,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:42,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:42,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127228427] [2019-11-23 22:56:42,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:42,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:42,335 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2019-11-23 22:56:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:42,421 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-11-23 22:56:42,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:56:42,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-23 22:56:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:42,436 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:56:42,437 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:56:42,442 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 [2019-11-23 22:56:42,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:56:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-23 22:56:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-23 22:56:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-23 22:56:42,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2019-11-23 22:56:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:42,490 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-23 22:56:42,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2019-11-23 22:56:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:56:42,492 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:42,492 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:42,493 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash 416191677, now seen corresponding path program 1 times [2019-11-23 22:56:42,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:42,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90961905] [2019-11-23 22:56:42,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:42,564 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 22:56:42,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90961905] [2019-11-23 22:56:42,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:42,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:56:42,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411588645] [2019-11-23 22:56:42,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:56:42,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:56:42,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:56:42,568 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 3 states. [2019-11-23 22:56:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:42,588 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2019-11-23 22:56:42,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:56:42,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 22:56:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:42,589 INFO L225 Difference]: With dead ends: 18 [2019-11-23 22:56:42,590 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:56:42,591 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 [2019-11-23 22:56:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:56:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:56:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:56:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2019-11-23 22:56:42,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2019-11-23 22:56:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:42,595 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2019-11-23 22:56:42,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:56:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2019-11-23 22:56:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:56:42,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:42,597 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:42,597 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1758222708, now seen corresponding path program 1 times [2019-11-23 22:56:42,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:42,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586096603] [2019-11-23 22:56:42,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:56:42,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586096603] [2019-11-23 22:56:42,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:56:42,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:56:42,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978040281] [2019-11-23 22:56:42,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:56:42,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:56:42,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:56:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:42,669 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2019-11-23 22:56:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:56:42,696 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2019-11-23 22:56:42,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:56:42,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:56:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:56:42,698 INFO L225 Difference]: With dead ends: 16 [2019-11-23 22:56:42,698 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:56:42,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:56:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:56:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:56:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:56:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-23 22:56:42,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2019-11-23 22:56:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:56:42,704 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-23 22:56:42,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:56:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-23 22:56:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:56:42,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:56:42,705 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:56:42,705 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:56:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:56:42,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1329829475, now seen corresponding path program 1 times [2019-11-23 22:56:42,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:56:42,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386116067] [2019-11-23 22:56:42,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:56:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:56:42,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386116067] [2019-11-23 22:56:42,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347201388] [2019-11-23 22:56:42,792 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 22:56:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:56:42,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:56:42,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:56:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:56:42,906 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:56:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:56:42,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717409120] [2019-11-23 22:56:42,968 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-23 22:56:42,968 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:56:42,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:56:42,991 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:56:42,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:56:44,945 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2019-11-23 22:56:45,095 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 124 [2019-11-23 22:57:14,566 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 249 [2019-11-23 22:57:16,095 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 253 [2019-11-23 22:57:19,453 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 263 [2019-11-23 22:57:21,206 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 264 [2019-11-23 22:57:23,335 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 270 [2019-11-23 22:57:23,457 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 269 [2019-11-23 22:57:25,376 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 272 [2019-11-23 22:57:29,405 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 281 [2019-11-23 22:57:31,374 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 285 [2019-11-23 22:57:33,364 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 288 [2019-11-23 22:57:37,270 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2019-11-23 22:57:37,382 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 294 [2019-11-23 22:57:37,597 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 296 [2019-11-23 22:57:39,969 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 305 [2019-11-23 22:57:41,889 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 311 [2019-11-23 22:57:42,018 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 308 [2019-11-23 22:57:44,062 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-11-23 22:57:44,172 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 311 [2019-11-23 22:57:46,284 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 318 [2019-11-23 22:57:46,408 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 315 [2019-11-23 22:57:48,533 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 322 [2019-11-23 22:57:48,671 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 316 [2019-11-23 22:57:48,900 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2019-11-23 22:57:51,493 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2019-11-23 22:57:51,645 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 321 [2019-11-23 22:57:51,774 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 323 [2019-11-23 22:57:51,889 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 324 [2019-11-23 22:57:54,272 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 328 [2019-11-23 22:57:54,401 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 328 [2019-11-23 22:57:56,613 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 335 [2019-11-23 22:57:56,744 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 332 [2019-11-23 22:57:59,518 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 336 [2019-11-23 22:57:59,653 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 336 [2019-11-23 22:58:02,132 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 22:58:02,282 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 340 [2019-11-23 22:58:04,673 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 347 [2019-11-23 22:58:04,829 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 343 [2019-11-23 22:58:04,981 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 345 [2019-11-23 22:58:05,114 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 346 [2019-11-23 22:58:07,660 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2019-11-23 22:58:07,819 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 347 [2019-11-23 22:58:07,977 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2019-11-23 22:58:08,106 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 348 [2019-11-23 22:58:10,722 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2019-11-23 22:58:10,858 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 347