/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/reducercommutativity/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:43:09,593 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:43:09,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:43:09,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:43:09,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:43:09,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:43:09,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:43:09,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:43:09,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:43:09,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:43:09,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:43:09,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:43:09,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:43:09,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:43:09,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:43:09,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:43:09,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:43:09,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:43:09,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:43:09,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:43:09,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:43:09,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:43:09,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:43:09,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:43:09,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:43:09,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:43:09,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:43:09,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:43:09,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 05:43:09,712 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:43:09,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:43:09,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:43:09,713 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:43:09,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:43:09,714 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:43:09,714 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:43:09,714 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:43:09,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:43:09,715 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:43:09,715 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:43:09,715 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:43:09,715 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:43:09,716 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:43:09,716 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:43:09,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:43:09,717 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:43:09,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:43:09,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:43:09,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:43:09,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:43:09,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:43:09,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:43:09,718 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:43:09,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:43:09,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:43:09,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:43:09,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:43:09,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:43:09,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:43:09,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:43:09,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:43:09,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:43:09,720 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:43:09,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:43:09,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:43:09,721 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:43:09,721 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:43:09,984 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:43:09,997 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:43:10,000 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:43:10,002 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:43:10,002 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:43:10,003 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-11-24 05:43:10,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75cb01be3/f3977770d89a41de9bbd1ab08a1019de/FLAG326796a3c [2019-11-24 05:43:10,514 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:43:10,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-11-24 05:43:10,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75cb01be3/f3977770d89a41de9bbd1ab08a1019de/FLAG326796a3c [2019-11-24 05:43:10,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75cb01be3/f3977770d89a41de9bbd1ab08a1019de [2019-11-24 05:43:10,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:43:10,943 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:43:10,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:43:10,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:43:10,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:43:10,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0ea6db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:10, skipping insertion in model container [2019-11-24 05:43:10,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:43:10" (1/1) ... [2019-11-24 05:43:10,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:43:10,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:43:11,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:43:11,148 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:43:11,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:43:11,192 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:43:11,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11 WrapperNode [2019-11-24 05:43:11,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:43:11,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:43:11,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:43:11,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:43:11,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:43:11,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:43:11,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:43:11,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:43:11,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... [2019-11-24 05:43:11,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:43:11,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:43:11,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:43:11,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:43:11,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:43:11,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:43:11,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:43:11,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:43:11,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:43:11,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:43:11,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:43:12,008 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:43:12,008 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:43:12,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:43:12 BoogieIcfgContainer [2019-11-24 05:43:12,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:43:12,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:43:12,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:43:12,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:43:12,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:43:10" (1/3) ... [2019-11-24 05:43:12,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4ba3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:43:12, skipping insertion in model container [2019-11-24 05:43:12,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:43:11" (2/3) ... [2019-11-24 05:43:12,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4ba3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:43:12, skipping insertion in model container [2019-11-24 05:43:12,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:43:12" (3/3) ... [2019-11-24 05:43:12,018 INFO L109 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2019-11-24 05:43:12,028 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:43:12,036 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:43:12,046 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:43:12,065 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:43:12,065 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:43:12,065 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:43:12,066 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:43:12,066 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:43:12,066 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:43:12,066 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:43:12,066 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:43:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:43:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:43:12,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:43:12,084 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:43:12,084 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:43:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:43:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1115299327, now seen corresponding path program 1 times [2019-11-24 05:43:12,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:43:12,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428984517] [2019-11-24 05:43:12,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:43:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:43:12,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428984517] [2019-11-24 05:43:12,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:43:12,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:43:12,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346936040] [2019-11-24 05:43:12,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:43:12,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:43:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:43:12,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:43:12,277 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:43:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:43:12,312 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:43:12,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:43:12,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:43:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:43:12,330 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:43:12,330 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:43:12,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:43:12,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:43:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:43:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:43:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:43:12,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:43:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:43:12,386 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:43:12,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:43:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:43:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:43:12,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:43:12,387 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:43:12,388 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:43:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:43:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1991853340, now seen corresponding path program 1 times [2019-11-24 05:43:12,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:43:12,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792908021] [2019-11-24 05:43:12,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:43:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 05:43:12,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792908021] [2019-11-24 05:43:12,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651476683] [2019-11-24 05:43:12,473 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 [2019-11-24 05:43:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:12,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:43:12,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:43:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:43:12,576 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:43:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 05:43:12,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:43:12,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:43:12,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515985197] [2019-11-24 05:43:12,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:43:12,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:43:12,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:43:12,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:43:12,603 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:43:12,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:43:12,656 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:43:12,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:43:12,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:43:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:43:12,658 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:43:12,658 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:43:12,659 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 [2019-11-24 05:43:12,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:43:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:43:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:43:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:43:12,663 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:43:12,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:43:12,664 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:43:12,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:43:12,664 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:43:12,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:43:12,665 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:43:12,665 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:43:12,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:43:12,870 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:43:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:43:12,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1952849532, now seen corresponding path program 1 times [2019-11-24 05:43:12,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:43:12,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466514092] [2019-11-24 05:43:12,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:43:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-24 05:43:12,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466514092] [2019-11-24 05:43:12,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237860601] [2019-11-24 05:43:12,963 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 [2019-11-24 05:43:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:13,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:43:13,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:43:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:43:13,089 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:43:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-24 05:43:13,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:43:13,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:43:13,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929721707] [2019-11-24 05:43:13,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:43:13,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:43:13,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:43:13,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:43:13,103 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:43:13,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:43:13,118 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:43:13,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:43:13,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:43:13,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:43:13,119 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:43:13,119 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:43:13,120 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 [2019-11-24 05:43:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:43:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:43:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:43:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:43:13,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:43:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:43:13,125 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:43:13,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:43:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:43:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:43:13,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:43:13,127 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:43:13,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:43:13,337 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:43:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:43:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1248077028, now seen corresponding path program 1 times [2019-11-24 05:43:13,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:43:13,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782681244] [2019-11-24 05:43:13,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:43:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:43:13,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782681244] [2019-11-24 05:43:13,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839359399] [2019-11-24 05:43:13,425 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 [2019-11-24 05:43:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:43:13,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:43:13,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:43:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:43:13,508 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:43:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-24 05:43:13,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1929998598] [2019-11-24 05:43:13,592 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:43:13,596 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:43:13,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:43:13,615 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:43:13,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:43:24,705 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 187 [2019-11-24 05:43:26,047 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 188 [2019-11-24 05:43:26,280 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 190 [2019-11-24 05:43:27,543 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 193 [2019-11-24 05:43:27,679 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 195 [2019-11-24 05:43:27,802 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 196 [2019-11-24 05:43:39,917 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 265 [2019-11-24 05:43:40,572 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 350 [2019-11-24 05:43:42,201 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 328 [2019-11-24 05:43:42,481 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 563 [2019-11-24 05:43:45,176 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7175 conjuctions. This might take some time... [2019-11-24 05:43:48,267 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7193 conjuctions. This might take some time... [2019-11-24 05:44:03,134 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 564 [2019-11-24 05:44:03,980 WARN L192 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 1082 DAG size of output: 1075 [2019-11-24 05:44:06,436 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5752 conjuctions. This might take some time... [2019-11-24 05:44:15,175 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7063 conjuctions. This might take some time... [2019-11-24 05:44:22,808 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5788 conjuctions. This might take some time... [2019-11-24 05:44:31,710 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 34730 conjuctions. This might take some time...