/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/max10-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:41:10,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:41:10,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:41:10,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:41:10,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:41:10,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:41:10,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:41:10,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:41:10,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:41:10,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:41:10,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:41:10,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:41:10,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:41:10,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:41:10,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:41:10,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:41:10,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:41:10,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:41:10,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:41:10,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:41:10,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:41:10,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:41:10,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:41:10,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:41:10,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:41:10,577 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 05:41:10,612 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:41:10,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:41:10,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:41:10,613 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:41:10,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:41:10,616 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:41:10,616 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:41:10,616 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:41:10,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:41:10,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:41:10,617 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:41:10,617 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:41:10,617 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:41:10,617 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:41:10,617 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:41:10,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:41:10,619 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:41:10,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:41:10,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:41:10,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:41:10,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:41:10,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:41:10,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:41:10,621 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:41:10,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:41:10,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:41:10,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:41:10,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:41:10,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:41:10,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:41:10,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:41:10,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:41:10,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:41:10,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:41:10,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:41:10,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:41:10,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:41:10,623 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:41:10,879 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:41:10,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:41:10,902 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:41:10,903 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:41:10,904 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:41:10,904 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max10-1.i [2019-11-24 05:41:10,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d016da360/c9f10978a49b4791b8bd1326cf53acfb/FLAG6b83fbc63 [2019-11-24 05:41:11,401 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:41:11,401 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max10-1.i [2019-11-24 05:41:11,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d016da360/c9f10978a49b4791b8bd1326cf53acfb/FLAG6b83fbc63 [2019-11-24 05:41:11,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d016da360/c9f10978a49b4791b8bd1326cf53acfb [2019-11-24 05:41:11,826 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:41:11,828 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:41:11,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:41:11,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:41:11,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:41:11,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:41:11" (1/1) ... [2019-11-24 05:41:11,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bcd91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:11, skipping insertion in model container [2019-11-24 05:41:11,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:41:11" (1/1) ... [2019-11-24 05:41:11,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:41:11,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:41:12,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:41:12,055 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:41:12,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:41:12,094 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:41:12,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12 WrapperNode [2019-11-24 05:41:12,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:41:12,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:41:12,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:41:12,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:41:12,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:41:12,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:41:12,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:41:12,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:41:12,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (1/1) ... [2019-11-24 05:41:12,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:41:12,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:41:12,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:41:12,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:41:12,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (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 05:41:12,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 05:41:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:41:12,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:41:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 05:41:12,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:41:12,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 05:41:12,942 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:41:12,942 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-24 05:41:12,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:41:12 BoogieIcfgContainer [2019-11-24 05:41:12,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:41:12,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:41:12,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:41:12,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:41:12,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:41:11" (1/3) ... [2019-11-24 05:41:12,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b0d343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:41:12, skipping insertion in model container [2019-11-24 05:41:12,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:41:12" (2/3) ... [2019-11-24 05:41:12,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b0d343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:41:12, skipping insertion in model container [2019-11-24 05:41:12,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:41:12" (3/3) ... [2019-11-24 05:41:12,960 INFO L109 eAbstractionObserver]: Analyzing ICFG max10-1.i [2019-11-24 05:41:12,971 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:41:12,978 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 05:41:12,990 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 05:41:13,013 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:41:13,013 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:41:13,013 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:41:13,013 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:41:13,014 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:41:13,014 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:41:13,014 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:41:13,014 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:41:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 05:41:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:41:13,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:13,035 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:13,036 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:13,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1794448249, now seen corresponding path program 1 times [2019-11-24 05:41:13,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:13,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123945434] [2019-11-24 05:41:13,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:13,194 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 05:41:13,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123945434] [2019-11-24 05:41:13,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:41:13,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:41:13,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140546726] [2019-11-24 05:41:13,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:41:13,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:41:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:41:13,214 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-24 05:41:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:13,248 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2019-11-24 05:41:13,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:41:13,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:41:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:13,258 INFO L225 Difference]: With dead ends: 21 [2019-11-24 05:41:13,259 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 05:41:13,262 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 05:41:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 05:41:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 05:41:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 05:41:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2019-11-24 05:41:13,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2019-11-24 05:41:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:13,293 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-24 05:41:13,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:41:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2019-11-24 05:41:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:41:13,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:13,294 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:13,294 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:13,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2024605637, now seen corresponding path program 1 times [2019-11-24 05:41:13,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:13,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957931737] [2019-11-24 05:41:13,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:13,362 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 05:41:13,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957931737] [2019-11-24 05:41:13,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513292562] [2019-11-24 05:41:13,363 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 05:41:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:13,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:41:13,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:13,472 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 05:41:13,472 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:13,490 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 05:41:13,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:41:13,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:41:13,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620808999] [2019-11-24 05:41:13,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:41:13,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:41:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:41:13,495 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2019-11-24 05:41:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:13,557 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2019-11-24 05:41:13,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:41:13,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 05:41:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:13,558 INFO L225 Difference]: With dead ends: 22 [2019-11-24 05:41:13,559 INFO L226 Difference]: Without dead ends: 16 [2019-11-24 05:41:13,560 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 05:41:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-24 05:41:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-24 05:41:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-24 05:41:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-11-24 05:41:13,567 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-11-24 05:41:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:13,568 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-11-24 05:41:13,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:41:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-11-24 05:41:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:41:13,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:13,571 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:13,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:13,779 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:13,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1835444987, now seen corresponding path program 1 times [2019-11-24 05:41:13,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:13,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178960255] [2019-11-24 05:41:13,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:13,845 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 05:41:13,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178960255] [2019-11-24 05:41:13,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310461162] [2019-11-24 05:41:13,846 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 05:41:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:13,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-24 05:41:13,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:13,940 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 05:41:13,941 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:13,949 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 05:41:13,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 05:41:13,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2019-11-24 05:41:13,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357446626] [2019-11-24 05:41:13,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 05:41:13,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:41:13,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 05:41:13,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:41:13,952 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-11-24 05:41:13,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:41:13,970 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2019-11-24 05:41:13,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 05:41:13,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 05:41:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:41:13,972 INFO L225 Difference]: With dead ends: 24 [2019-11-24 05:41:13,972 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 05:41:13,973 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 05:41:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 05:41:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 05:41:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 05:41:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-24 05:41:13,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2019-11-24 05:41:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:41:13,978 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-24 05:41:13,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 05:41:13,979 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-24 05:41:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:41:13,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:41:13,979 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:41:14,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 05:41:14,183 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:41:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:41:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash 293651941, now seen corresponding path program 1 times [2019-11-24 05:41:14,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:41:14,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821095579] [2019-11-24 05:41:14,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:41:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:14,246 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 05:41:14,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821095579] [2019-11-24 05:41:14,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274637139] [2019-11-24 05:41:14,247 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 05:41:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:41:14,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:41:14,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:41:14,319 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 05:41:14,320 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:41:14,342 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 05:41:14,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554910591] [2019-11-24 05:41:14,378 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-11-24 05:41:14,378 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:41:14,387 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:41:14,397 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:41:14,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:41:18,766 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2019-11-24 05:41:19,095 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 293 [2019-11-24 05:41:19,523 WARN L192 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 474 [2019-11-24 05:41:20,364 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 474 [2019-11-24 05:41:21,247 WARN L192 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 793 [2019-11-24 05:41:23,659 WARN L192 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 794 DAG size of output: 779 [2019-11-24 05:41:25,482 WARN L192 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 1318 [2019-11-24 05:41:37,428 WARN L192 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 1319 DAG size of output: 1319 [2019-11-24 05:41:42,774 WARN L192 SmtUtils]: Spent 5.01 s on a formula simplification that was a NOOP. DAG size: 2162 [2019-11-24 05:41:48,782 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6041 conjuctions. This might take some time... [2019-11-24 05:42:02,648 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5723 conjuctions. This might take some time... [2019-11-24 05:42:09,677 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5583 conjuctions. This might take some time... [2019-11-24 05:42:12,667 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11282 conjuctions. This might take some time... [2019-11-24 05:42:45,661 WARN L192 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 2163 DAG size of output: 2162