/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/avg40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:40:47,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:40:47,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:40:47,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:40:47,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:40:47,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:40:47,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:40:47,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:40:47,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:40:47,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:40:47,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:40:47,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:40:47,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:40:47,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:40:47,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:40:47,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:40:47,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:40:47,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:40:47,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:40:47,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:40:47,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:40:47,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:40:47,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:40:47,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:40:47,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:40:47,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:40:47,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:40:47,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:40:47,217 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 05:40:47,252 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:40:47,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:40:47,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:40:47,256 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:40:47,257 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:40:47,257 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:40:47,257 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:40:47,257 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:40:47,257 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:40:47,257 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:40:47,259 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:40:47,259 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:40:47,259 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:40:47,260 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:40:47,260 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:40:47,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:40:47,261 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:40:47,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:40:47,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:40:47,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:40:47,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:40:47,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:40:47,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:40:47,263 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:40:47,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:40:47,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:40:47,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:40:47,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:40:47,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:40:47,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:40:47,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:40:47,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:40:47,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:40:47,265 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:40:47,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:40:47,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:40:47,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:40:47,265 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:40:47,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:40:47,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:40:47,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:40:47,589 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:40:47,589 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:40:47,590 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-11-24 05:40:47,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a759fa6/dfb6fb7cb6c94cdfaee5bc837f176ce0/FLAGf52a0bd35 [2019-11-24 05:40:48,085 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:40:48,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg40-2.i [2019-11-24 05:40:48,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a759fa6/dfb6fb7cb6c94cdfaee5bc837f176ce0/FLAGf52a0bd35 [2019-11-24 05:40:48,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a759fa6/dfb6fb7cb6c94cdfaee5bc837f176ce0 [2019-11-24 05:40:48,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:40:48,528 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:40:48,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:40:48,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:40:48,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:40:48,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:48,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2db4663a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48, skipping insertion in model container [2019-11-24 05:40:48,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:48,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:40:48,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:40:48,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:40:48,835 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:40:48,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:40:48,872 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:40:48,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48 WrapperNode [2019-11-24 05:40:48,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:40:48,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:40:48,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:40:48,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:40:48,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:48,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:48,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:40:48,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:40:48,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:40:48,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:40:49,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:49,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:49,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:49,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:49,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:49,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:49,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (1/1) ... [2019-11-24 05:40:49,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:40:49,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:40:49,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:40:49,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:40:49,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (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 05:40:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:40:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:40:49,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:40:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:40:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:40:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:40:49,589 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:40:49,590 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:40:49,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:40:49 BoogieIcfgContainer [2019-11-24 05:40:49,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:40:49,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:40:49,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:40:49,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:40:49,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:40:48" (1/3) ... [2019-11-24 05:40:49,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e5b8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:40:49, skipping insertion in model container [2019-11-24 05:40:49,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:40:48" (2/3) ... [2019-11-24 05:40:49,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e5b8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:40:49, skipping insertion in model container [2019-11-24 05:40:49,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:40:49" (3/3) ... [2019-11-24 05:40:49,600 INFO L109 eAbstractionObserver]: Analyzing ICFG avg40-2.i [2019-11-24 05:40:49,608 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:40:49,616 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:40:49,626 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:40:49,645 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:40:49,645 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:40:49,646 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:40:49,646 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:40:49,646 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:40:49,646 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:40:49,646 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:40:49,647 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:40:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:40:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:40:49,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:49,672 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:49,673 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:49,678 INFO L82 PathProgramCache]: Analyzing trace with hash 652281750, now seen corresponding path program 1 times [2019-11-24 05:40:49,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:49,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95701779] [2019-11-24 05:40:49,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:49,828 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 05:40:49,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95701779] [2019-11-24 05:40:49,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:40:49,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:40:49,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145515901] [2019-11-24 05:40:49,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:40:49,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:49,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:40:49,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:40:49,849 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:40:49,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:49,877 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:40:49,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:40:49,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:40:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:49,889 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:40:49,889 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:40:49,892 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 05:40:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:40:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:40:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:40:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:40:49,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:40:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:49,924 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:40:49,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:40:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:40:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:40:49,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:49,926 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:49,926 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash 184277197, now seen corresponding path program 1 times [2019-11-24 05:40:49,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:49,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956131295] [2019-11-24 05:40:49,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:49,996 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 05:40:49,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956131295] [2019-11-24 05:40:49,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7733480] [2019-11-24 05:40:49,999 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 05:40:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:50,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:40:50,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:40:50,100 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 05:40:50,100 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:40:50,117 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 05:40:50,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:40:50,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:40:50,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365779022] [2019-11-24 05:40:50,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:40:50,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:50,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:40:50,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:40:50,121 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:40:50,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:50,191 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:40:50,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:40:50,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:40:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:50,194 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:40:50,194 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:40:50,195 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 05:40:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:40:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:40:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:40:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:40:50,200 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:40:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:50,201 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:40:50,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:40:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:40:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:40:50,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:50,202 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:50,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:40:50,407 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:50,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1226965997, now seen corresponding path program 1 times [2019-11-24 05:40:50,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:50,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841386466] [2019-11-24 05:40:50,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:50,468 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 05:40:50,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841386466] [2019-11-24 05:40:50,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910838212] [2019-11-24 05:40:50,469 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 05:40:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:50,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:40:50,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:40:50,594 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 05:40:50,594 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:40:50,608 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 05:40:50,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:40:50,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:40:50,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175303046] [2019-11-24 05:40:50,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:40:50,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:40:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:40:50,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:40:50,613 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:40:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:40:50,641 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:40:50,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:40:50,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:40:50,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:40:50,645 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:40:50,645 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:40:50,645 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 05:40:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:40:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:40:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:40:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:40:50,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:40:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:40:50,654 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:40:50,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:40:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:40:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:40:50,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:40:50,656 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:40:50,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:40:50,867 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:40:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:40:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1575042285, now seen corresponding path program 1 times [2019-11-24 05:40:50,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:40:50,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755509498] [2019-11-24 05:40:50,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:40:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:50,951 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 05:40:50,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755509498] [2019-11-24 05:40:50,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361594958] [2019-11-24 05:40:50,952 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 05:40:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:40:51,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:40:51,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:40:51,018 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 05:40:51,018 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:40:51,043 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 05:40:51,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729844971] [2019-11-24 05:40:51,091 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:40:51,091 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:40:51,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:40:51,104 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:40:51,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:41:02,528 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 190 [2019-11-24 05:41:18,861 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2019-11-24 05:41:19,212 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 256 [2019-11-24 05:41:19,485 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 256 [2019-11-24 05:41:19,661 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2019-11-24 05:41:20,071 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 278 [2019-11-24 05:41:20,249 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2019-11-24 05:41:20,746 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 322 [2019-11-24 05:41:21,041 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-11-24 05:41:21,957 WARN L192 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 363 [2019-11-24 05:41:22,464 WARN L192 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 447 [2019-11-24 05:41:24,143 WARN L192 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 448 [2019-11-24 05:41:24,856 WARN L192 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 532 [2019-11-24 05:41:28,093 WARN L192 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 533 [2019-11-24 05:41:29,009 WARN L192 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 623 [2019-11-24 05:41:35,047 WARN L192 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 623 [2019-11-24 05:41:36,376 WARN L192 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 740 [2019-11-24 05:41:47,923 WARN L192 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 741 DAG size of output: 729 [2019-11-24 05:41:49,955 WARN L192 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 881 [2019-11-24 05:42:03,706 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 882 DAG size of output: 882 [2019-11-24 05:42:06,633 WARN L192 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 1056 [2019-11-24 05:42:16,761 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5087 conjuctions. This might take some time...