/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/loop-crafted/simple_array_index_value_4.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:15:37,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:15:37,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:15:37,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:15:37,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:15:37,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:15:37,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:15:37,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:15:37,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:15:37,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:15:37,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:15:37,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-24 04:15:37,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:15:37,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:15:37,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:15:37,990 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 04:15:38,006 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:15:38,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:15:38,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:15:38,008 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:15:38,008 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:15:38,008 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:15:38,008 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:15:38,008 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:15:38,009 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:15:38,009 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:15:38,009 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:15:38,009 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:15:38,009 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:15:38,010 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:15:38,010 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:15:38,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:15:38,011 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:15:38,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:15:38,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:15:38,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:15:38,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:15:38,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:15:38,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:15:38,012 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:15:38,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:15:38,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:15:38,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:15:38,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:15:38,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:15:38,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:15:38,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:15:38,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:15:38,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:15:38,014 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:15:38,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:15:38,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:15:38,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:15:38,015 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:15:38,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:15:38,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:15:38,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:15:38,316 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:15:38,317 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:15:38,317 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+lhb-reducer.c [2019-11-24 04:15:38,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7c5e3f3/d4d080fa25e340f99d4629ff270c58c6/FLAGef2b2f887 [2019-11-24 04:15:38,871 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:15:38,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+lhb-reducer.c [2019-11-24 04:15:38,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7c5e3f3/d4d080fa25e340f99d4629ff270c58c6/FLAGef2b2f887 [2019-11-24 04:15:39,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7c5e3f3/d4d080fa25e340f99d4629ff270c58c6 [2019-11-24 04:15:39,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:15:39,217 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:15:39,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:15:39,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:15:39,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:15:39,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a725cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39, skipping insertion in model container [2019-11-24 04:15:39,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:15:39,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:15:39,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:15:39,450 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:15:39,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:15:39,580 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:15:39,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39 WrapperNode [2019-11-24 04:15:39,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:15:39,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:15:39,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:15:39,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:15:39,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:15:39,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:15:39,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:15:39,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:15:39,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (1/1) ... [2019-11-24 04:15:39,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:15:39,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:15:39,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:15:39,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:15:39,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (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 04:15:39,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:15:39,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:15:39,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:15:39,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:15:39,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 04:15:40,111 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:15:40,111 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-24 04:15:40,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:15:40 BoogieIcfgContainer [2019-11-24 04:15:40,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:15:40,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:15:40,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:15:40,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:15:40,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:15:39" (1/3) ... [2019-11-24 04:15:40,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591e890a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:15:40, skipping insertion in model container [2019-11-24 04:15:40,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:15:39" (2/3) ... [2019-11-24 04:15:40,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591e890a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:15:40, skipping insertion in model container [2019-11-24 04:15:40,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:15:40" (3/3) ... [2019-11-24 04:15:40,120 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+lhb-reducer.c [2019-11-24 04:15:40,129 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:15:40,136 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-24 04:15:40,147 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-24 04:15:40,169 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:15:40,169 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:15:40,169 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:15:40,169 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:15:40,169 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:15:40,169 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:15:40,170 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:15:40,170 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:15:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-11-24 04:15:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:15:40,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:40,187 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:40,188 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash -238958999, now seen corresponding path program 1 times [2019-11-24 04:15:40,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:40,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859525781] [2019-11-24 04:15:40,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:40,367 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 04:15:40,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859525781] [2019-11-24 04:15:40,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:40,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:15:40,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125563237] [2019-11-24 04:15:40,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:15:40,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:15:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:40,391 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-11-24 04:15:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:40,448 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2019-11-24 04:15:40,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:15:40,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:15:40,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:40,461 INFO L225 Difference]: With dead ends: 47 [2019-11-24 04:15:40,462 INFO L226 Difference]: Without dead ends: 29 [2019-11-24 04:15:40,467 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 04:15:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-24 04:15:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-24 04:15:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-24 04:15:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-24 04:15:40,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 8 [2019-11-24 04:15:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:40,517 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-24 04:15:40,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:15:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-24 04:15:40,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:15:40,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:40,519 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:40,520 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:40,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1055861953, now seen corresponding path program 1 times [2019-11-24 04:15:40,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:40,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903833727] [2019-11-24 04:15:40,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:40,573 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 04:15:40,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903833727] [2019-11-24 04:15:40,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:40,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:15:40,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618724831] [2019-11-24 04:15:40,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:15:40,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:40,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:15:40,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:40,577 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-11-24 04:15:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:40,637 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-11-24 04:15:40,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:15:40,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-24 04:15:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:40,639 INFO L225 Difference]: With dead ends: 55 [2019-11-24 04:15:40,639 INFO L226 Difference]: Without dead ends: 34 [2019-11-24 04:15:40,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-24 04:15:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2019-11-24 04:15:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-24 04:15:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-24 04:15:40,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2019-11-24 04:15:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:40,647 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-24 04:15:40,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:15:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-24 04:15:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:15:40,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:40,648 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:40,649 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1125304774, now seen corresponding path program 1 times [2019-11-24 04:15:40,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:40,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146719934] [2019-11-24 04:15:40,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:40,720 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 04:15:40,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146719934] [2019-11-24 04:15:40,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:40,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:15:40,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869279021] [2019-11-24 04:15:40,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:15:40,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:40,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:15:40,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:15:40,723 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-11-24 04:15:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:40,779 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2019-11-24 04:15:40,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:15:40,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-24 04:15:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:40,782 INFO L225 Difference]: With dead ends: 48 [2019-11-24 04:15:40,783 INFO L226 Difference]: Without dead ends: 46 [2019-11-24 04:15:40,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:15:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-24 04:15:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2019-11-24 04:15:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-24 04:15:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-24 04:15:40,798 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 9 [2019-11-24 04:15:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:40,798 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-24 04:15:40,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:15:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-24 04:15:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:15:40,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:40,800 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:40,800 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash -461793925, now seen corresponding path program 1 times [2019-11-24 04:15:40,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:40,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132910103] [2019-11-24 04:15:40,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:40,850 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 04:15:40,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132910103] [2019-11-24 04:15:40,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:40,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:15:40,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829613725] [2019-11-24 04:15:40,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:15:40,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:40,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:15:40,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:40,852 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2019-11-24 04:15:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:40,885 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-11-24 04:15:40,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:15:40,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-24 04:15:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:40,886 INFO L225 Difference]: With dead ends: 51 [2019-11-24 04:15:40,886 INFO L226 Difference]: Without dead ends: 30 [2019-11-24 04:15:40,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:15:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-24 04:15:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-24 04:15:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-24 04:15:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-24 04:15:40,891 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2019-11-24 04:15:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:40,892 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-24 04:15:40,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:15:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-24 04:15:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:15:40,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:40,893 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:40,893 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:40,894 INFO L82 PathProgramCache]: Analyzing trace with hash 67089498, now seen corresponding path program 1 times [2019-11-24 04:15:40,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:40,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689214248] [2019-11-24 04:15:40,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:41,956 WARN L192 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 86 [2019-11-24 04:15:42,030 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 04:15:42,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689214248] [2019-11-24 04:15:42,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:42,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-24 04:15:42,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801231312] [2019-11-24 04:15:42,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-24 04:15:42,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:42,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-24 04:15:42,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:15:42,034 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2019-11-24 04:15:42,235 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 40 [2019-11-24 04:15:42,420 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 44 [2019-11-24 04:15:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:42,456 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-11-24 04:15:42,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-24 04:15:42,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-24 04:15:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:42,457 INFO L225 Difference]: With dead ends: 42 [2019-11-24 04:15:42,457 INFO L226 Difference]: Without dead ends: 26 [2019-11-24 04:15:42,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-24 04:15:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-24 04:15:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-24 04:15:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-24 04:15:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-24 04:15:42,463 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-11-24 04:15:42,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:42,464 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-24 04:15:42,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-24 04:15:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-24 04:15:42,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:15:42,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:42,465 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:42,466 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:42,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1399323306, now seen corresponding path program 1 times [2019-11-24 04:15:42,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:42,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520741322] [2019-11-24 04:15:42,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:42,519 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 04:15:42,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520741322] [2019-11-24 04:15:42,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:15:42,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 04:15:42,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795873293] [2019-11-24 04:15:42,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:15:42,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:15:42,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:15:42,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:15:42,523 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2019-11-24 04:15:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:15:42,596 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-24 04:15:42,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 04:15:42,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-24 04:15:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:15:42,597 INFO L225 Difference]: With dead ends: 39 [2019-11-24 04:15:42,597 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 04:15:42,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-24 04:15:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 04:15:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2019-11-24 04:15:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-24 04:15:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-24 04:15:42,604 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2019-11-24 04:15:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:15:42,604 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-24 04:15:42,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:15:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-24 04:15:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:15:42,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:15:42,605 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:15:42,606 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:15:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:15:42,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1507348966, now seen corresponding path program 1 times [2019-11-24 04:15:42,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:15:42,607 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381249097] [2019-11-24 04:15:42,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:15:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:53,667 WARN L192 SmtUtils]: Spent 8.42 s on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2019-11-24 04:15:55,925 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-11-24 04:15:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:15:56,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381249097] [2019-11-24 04:15:56,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595207761] [2019-11-24 04:15:56,324 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 04:15:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:15:56,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-24 04:15:56,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:16:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:16:02,639 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:16:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:16:03,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070750613] [2019-11-24 04:16:03,511 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-24 04:16:03,512 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:16:03,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:16:03,525 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:16:03,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:16:10,774 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:16:11,217 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2019-11-24 04:16:14,998 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-11-24 04:16:19,842 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2019-11-24 04:16:23,374 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2019-11-24 04:16:31,809 WARN L192 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2019-11-24 04:16:35,616 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2019-11-24 04:16:35,619 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:16:35,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:16:35,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2019-11-24 04:16:35,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392305025] [2019-11-24 04:16:35,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-24 04:16:35,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:16:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-24 04:16:35,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=513, Unknown=8, NotChecked=0, Total=650 [2019-11-24 04:16:35,621 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-11-24 04:16:55,953 WARN L192 SmtUtils]: Spent 15.59 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2019-11-24 04:17:11,258 WARN L192 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 43 DAG size of output: 37