/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_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:58:08,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:58:08,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:58:08,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:58:08,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:58:08,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:58:08,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:58:08,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:58:08,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:58:08,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:58:08,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:58:08,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:58:08,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:58:08,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:58:08,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:58:08,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:58:08,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:58:08,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:58:08,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:58:08,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:58:08,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:58:08,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:58:08,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:58:08,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:58:08,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:58:08,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:58:08,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:58:08,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:58:08,643 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 22:58:08,657 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:58:08,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:58:08,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 22:58:08,658 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 22:58:08,658 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 22:58:08,659 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 22:58:08,659 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 22:58:08,659 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 22:58:08,659 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 22:58:08,659 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 22:58:08,659 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 22:58:08,660 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 22:58:08,660 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 22:58:08,660 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 22:58:08,660 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 22:58:08,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:58:08,661 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:58:08,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:58:08,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:58:08,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:58:08,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:58:08,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:58:08,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:58:08,662 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:58:08,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:58:08,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:58:08,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:58:08,663 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:58:08,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:58:08,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:58:08,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:58:08,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:58:08,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:58:08,664 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 22:58:08,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:58:08,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:58:08,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:58:08,665 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 22:58:08,935 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:58:08,947 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:58:08,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:58:08,952 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:58:08,952 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:58:08,953 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2019-11-23 22:58:09,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9c2e0b7/9fc3e3cc5eb3454bb30a588efc063240/FLAGcf99d74fb [2019-11-23 22:58:09,509 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:58:09,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2019-11-23 22:58:09,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9c2e0b7/9fc3e3cc5eb3454bb30a588efc063240/FLAGcf99d74fb [2019-11-23 22:58:09,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f9c2e0b7/9fc3e3cc5eb3454bb30a588efc063240 [2019-11-23 22:58:09,902 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:58:09,904 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:58:09,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:09,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:58:09,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:58:09,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:09" (1/1) ... [2019-11-23 22:58:09,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51664aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:09, skipping insertion in model container [2019-11-23 22:58:09,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:58:09" (1/1) ... [2019-11-23 22:58:09,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:58:09,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:58:10,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:10,135 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:58:10,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:58:10,177 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:58:10,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10 WrapperNode [2019-11-23 22:58:10,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:58:10,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:10,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:58:10,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:58:10,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:58:10,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:58:10,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:58:10,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:58:10,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (1/1) ... [2019-11-23 22:58:10,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:58:10,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:58:10,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:58:10,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:58:10,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (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 22:58:10,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:58:10,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 22:58:10,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:58:10,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:58:10,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:58:10,791 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:58:10,791 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 22:58:10,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:10 BoogieIcfgContainer [2019-11-23 22:58:10,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:58:10,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:58:10,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:58:10,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:58:10,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:58:09" (1/3) ... [2019-11-23 22:58:10,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730a9006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:10, skipping insertion in model container [2019-11-23 22:58:10,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:58:10" (2/3) ... [2019-11-23 22:58:10,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730a9006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:58:10, skipping insertion in model container [2019-11-23 22:58:10,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:58:10" (3/3) ... [2019-11-23 22:58:10,801 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2019-11-23 22:58:10,811 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:58:10,819 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:58:10,830 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:58:10,854 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:58:10,854 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:58:10,854 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:58:10,855 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:58:10,855 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:58:10,855 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:58:10,856 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:58:10,856 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:58:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 22:58:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:58:10,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:10,873 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:10,873 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2032339455, now seen corresponding path program 1 times [2019-11-23 22:58:10,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:10,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992886848] [2019-11-23 22:58:10,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:11,056 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 22:58:11,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992886848] [2019-11-23 22:58:11,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:11,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:11,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978975119] [2019-11-23 22:58:11,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:11,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:11,084 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2019-11-23 22:58:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:11,165 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2019-11-23 22:58:11,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:58:11,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:58:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:11,180 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:58:11,180 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 22:58:11,185 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 22:58:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 22:58:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 22:58:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 22:58:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2019-11-23 22:58:11,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 9 [2019-11-23 22:58:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:11,231 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2019-11-23 22:58:11,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2019-11-23 22:58:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:58:11,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:11,233 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:11,234 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:11,234 INFO L82 PathProgramCache]: Analyzing trace with hash 308567483, now seen corresponding path program 1 times [2019-11-23 22:58:11,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:11,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14818178] [2019-11-23 22:58:11,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:11,315 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 22:58:11,315 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14818178] [2019-11-23 22:58:11,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:11,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:58:11,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546317794] [2019-11-23 22:58:11,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:58:11,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:11,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:58:11,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:58:11,319 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand 3 states. [2019-11-23 22:58:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:11,349 INFO L93 Difference]: Finished difference Result 26 states and 40 transitions. [2019-11-23 22:58:11,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:58:11,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 22:58:11,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:11,350 INFO L225 Difference]: With dead ends: 26 [2019-11-23 22:58:11,351 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:58:11,352 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 22:58:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:58:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:58:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:58:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2019-11-23 22:58:11,357 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 10 [2019-11-23 22:58:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:11,357 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 22 transitions. [2019-11-23 22:58:11,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:58:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 22 transitions. [2019-11-23 22:58:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:58:11,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:11,359 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:11,359 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1258553480, now seen corresponding path program 1 times [2019-11-23 22:58:11,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:11,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894321866] [2019-11-23 22:58:11,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:11,427 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 22:58:11,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894321866] [2019-11-23 22:58:11,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:58:11,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:58:11,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331753195] [2019-11-23 22:58:11,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:58:11,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 22:58:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:58:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:58:11,430 INFO L87 Difference]: Start difference. First operand 15 states and 22 transitions. Second operand 4 states. [2019-11-23 22:58:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:58:11,504 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2019-11-23 22:58:11,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:58:11,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:58:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:58:11,506 INFO L225 Difference]: With dead ends: 24 [2019-11-23 22:58:11,506 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:58:11,509 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 22:58:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:58:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:58:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:58:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-23 22:58:11,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 11 [2019-11-23 22:58:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:58:11,517 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-23 22:58:11,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:58:11,517 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2019-11-23 22:58:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:58:11,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:58:11,518 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:58:11,519 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:58:11,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:58:11,519 INFO L82 PathProgramCache]: Analyzing trace with hash -147827394, now seen corresponding path program 1 times [2019-11-23 22:58:11,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 22:58:11,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8415300] [2019-11-23 22:58:11,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:58:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:58:11,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8415300] [2019-11-23 22:58:11,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166431182] [2019-11-23 22:58:11,628 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 22:58:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:58:11,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:58:11,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:58:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:58:11,757 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 22:58:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:58:11,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1686476329] [2019-11-23 22:58:11,834 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2019-11-23 22:58:11,835 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 22:58:11,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 22:58:11,851 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 22:58:11,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 22:58:13,659 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2019-11-23 22:58:13,783 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 125 [2019-11-23 22:58:13,952 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-23 22:58:14,073 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 128 [2019-11-23 22:58:22,147 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 180 [2019-11-23 22:58:51,205 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 260 [2019-11-23 22:58:53,090 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 262 [2019-11-23 22:58:56,715 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 269 [2019-11-23 22:59:04,822 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 290 [2019-11-23 22:59:09,186 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 296 [2019-11-23 22:59:09,414 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 298 [2019-11-23 22:59:11,576 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 303 [2019-11-23 22:59:14,051 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 307 [2019-11-23 22:59:16,264 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-11-23 22:59:16,391 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 311 [2019-11-23 22:59:18,474 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 321 [2019-11-23 22:59:18,620 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 315 [2019-11-23 22:59:21,126 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 320 [2019-11-23 22:59:21,271 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 318 [2019-11-23 22:59:23,564 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2019-11-23 22:59:23,708 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 321 [2019-11-23 22:59:26,327 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 325 [2019-11-23 22:59:26,478 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 323 [2019-11-23 22:59:26,612 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 325 [2019-11-23 22:59:26,744 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 323 [2019-11-23 22:59:26,971 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 325 [2019-11-23 22:59:29,244 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 329 [2019-11-23 22:59:29,367 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 330 [2019-11-23 22:59:31,709 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 339 [2019-11-23 22:59:31,853 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 335 [2019-11-23 22:59:34,274 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 339 [2019-11-23 22:59:34,408 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 339 [2019-11-23 22:59:36,707 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 343 [2019-11-23 22:59:36,852 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 340 [2019-11-23 22:59:36,995 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2019-11-23 22:59:37,156 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 342 [2019-11-23 22:59:39,637 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2019-11-23 22:59:39,788 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 347 [2019-11-23 22:59:42,193 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 352 [2019-11-23 22:59:42,360 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 351