/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/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:27:43,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:27:43,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:27:43,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:27:43,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:27:43,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:27:43,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:27:43,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:27:43,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:27:43,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:27:43,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:27:43,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:27:43,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:27:43,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:27:43,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:27:43,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:27:43,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:27:43,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:27:43,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:27:43,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:27:43,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:27:43,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:27:43,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:27:43,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:27:43,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:27:43,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:27:43,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:27:43,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:27:43,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:27:43,989 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:27:43,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:27:43,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:27:43,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:27:43,992 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:27:43,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:27:43,992 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:27:43,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:27:43,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:27:43,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:27:43,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:27:43,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:27:43,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:27:43,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:27:43,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:27:43,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:27:43,995 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:27:43,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:27:43,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:27:43,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:27:43,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:27:43,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:27:43,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:27:43,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:27:43,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:27:43,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:27:43,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:27:43,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:27:43,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:27:43,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:27:44,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:27:44,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:27:44,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:27:44,295 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:27:44,296 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:27:44,296 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init2_ground-2.i [2019-11-23 20:27:44,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/259f8d2cb/e346733c3a5f44d1a4b060c0bf5706d1/FLAGea0cb09f6 [2019-11-23 20:27:44,815 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:27:44,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init2_ground-2.i [2019-11-23 20:27:44,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/259f8d2cb/e346733c3a5f44d1a4b060c0bf5706d1/FLAGea0cb09f6 [2019-11-23 20:27:45,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/259f8d2cb/e346733c3a5f44d1a4b060c0bf5706d1 [2019-11-23 20:27:45,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:27:45,269 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:27:45,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:45,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:27:45,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:27:45,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@262ce2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45, skipping insertion in model container [2019-11-23 20:27:45,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:27:45,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:27:45,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:45,517 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:27:45,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:45,554 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:27:45,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45 WrapperNode [2019-11-23 20:27:45,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:45,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:45,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:27:45,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:27:45,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:45,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:27:45,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:27:45,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:27:45,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... [2019-11-23 20:27:45,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:27:45,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:27:45,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:27:45,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:27:45,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:27:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:27:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:27:45,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:27:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:27:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:27:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:27:46,017 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:27:46,018 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:27:46,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:46 BoogieIcfgContainer [2019-11-23 20:27:46,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:27:46,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:27:46,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:27:46,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:27:46,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:27:45" (1/3) ... [2019-11-23 20:27:46,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcf5e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:46, skipping insertion in model container [2019-11-23 20:27:46,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:45" (2/3) ... [2019-11-23 20:27:46,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcf5e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:46, skipping insertion in model container [2019-11-23 20:27:46,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:46" (3/3) ... [2019-11-23 20:27:46,045 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-2.i [2019-11-23 20:27:46,063 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:27:46,069 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:27:46,080 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:27:46,104 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:27:46,104 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:27:46,104 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:27:46,104 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:27:46,104 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:27:46,105 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:27:46,105 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:27:46,105 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:27:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-23 20:27:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:27:46,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:46,127 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:46,127 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1157636873, now seen corresponding path program 1 times [2019-11-23 20:27:46,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:46,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112346292] [2019-11-23 20:27:46,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:46,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112346292] [2019-11-23 20:27:46,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:27:46,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:27:46,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473492932] [2019-11-23 20:27:46,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:27:46,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:27:46,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:27:46,298 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-11-23 20:27:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:46,347 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2019-11-23 20:27:46,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:27:46,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:27:46,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:46,359 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:27:46,359 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 20:27:46,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:27:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 20:27:46,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 20:27:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:27:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-23 20:27:46,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-23 20:27:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:46,396 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-23 20:27:46,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:27:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-23 20:27:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:27:46,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:46,397 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:46,398 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash 970257334, now seen corresponding path program 1 times [2019-11-23 20:27:46,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:46,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521429434] [2019-11-23 20:27:46,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:27:46,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521429434] [2019-11-23 20:27:46,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141878574] [2019-11-23 20:27:46,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:46,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:27:46,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:27:46,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:46,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:27:46,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201337229] [2019-11-23 20:27:46,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:27:46,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:46,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:27:46,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:46,560 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2019-11-23 20:27:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:46,630 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-23 20:27:46,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:27:46,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-23 20:27:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:46,633 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:27:46,633 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:27:46,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:27:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:27:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:27:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:27:46,644 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:27:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:46,644 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:27:46,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:27:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:27:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:27:46,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:46,645 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:46,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:46,848 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1117998999, now seen corresponding path program 2 times [2019-11-23 20:27:46,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:46,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123142738] [2019-11-23 20:27:46,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:27:46,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123142738] [2019-11-23 20:27:46,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595562179] [2019-11-23 20:27:46,930 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 20:27:46,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:46,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:46,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:27:46,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:27:47,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:47,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:27:47,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574149323] [2019-11-23 20:27:47,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:27:47,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:47,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:27:47,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:47,010 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2019-11-23 20:27:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:47,059 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-11-23 20:27:47,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:27:47,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-23 20:27:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:47,061 INFO L225 Difference]: With dead ends: 29 [2019-11-23 20:27:47,061 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:27:47,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:27:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-23 20:27:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:27:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-23 20:27:47,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-23 20:27:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:47,067 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-23 20:27:47,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:27:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-23 20:27:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:27:47,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:47,068 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:47,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:47,272 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:47,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:47,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1025156458, now seen corresponding path program 3 times [2019-11-23 20:27:47,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:47,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033189477] [2019-11-23 20:27:47,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:27:47,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033189477] [2019-11-23 20:27:47,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163118509] [2019-11-23 20:27:47,372 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:27:47,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:27:47,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:47,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:27:47,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:27:47,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:47,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:27:47,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431236920] [2019-11-23 20:27:47,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:27:47,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:27:47,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:47,456 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2019-11-23 20:27:47,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:47,522 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-11-23 20:27:47,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:27:47,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-23 20:27:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:47,524 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:27:47,524 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:27:47,525 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:27:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:27:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:27:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:27:47,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-23 20:27:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:47,535 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:27:47,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:27:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:27:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:27:47,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:47,536 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:47,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:47,742 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:47,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:47,742 INFO L82 PathProgramCache]: Analyzing trace with hash -57021897, now seen corresponding path program 4 times [2019-11-23 20:27:47,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:47,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339894377] [2019-11-23 20:27:47,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:27:47,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339894377] [2019-11-23 20:27:47,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616585420] [2019-11-23 20:27:47,872 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:47,912 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:47,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:47,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:27:47,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:27:47,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:47,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:27:47,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023594118] [2019-11-23 20:27:47,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:27:47,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:47,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:27:47,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:47,930 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2019-11-23 20:27:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:47,987 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-23 20:27:47,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:27:47,990 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-23 20:27:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:47,990 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:27:47,991 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:27:47,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:27:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 20:27:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:27:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 20:27:48,002 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2019-11-23 20:27:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:48,002 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 20:27:48,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:27:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 20:27:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:27:48,006 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:48,006 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:48,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:48,207 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 315152758, now seen corresponding path program 5 times [2019-11-23 20:27:48,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:48,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213808493] [2019-11-23 20:27:48,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:27:48,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213808493] [2019-11-23 20:27:48,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104655911] [2019-11-23 20:27:48,287 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:48,370 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:27:48,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:48,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:27:48,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:27:48,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:48,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:27:48,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677580574] [2019-11-23 20:27:48,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:27:48,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:27:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:48,392 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2019-11-23 20:27:48,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:48,431 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:27:48,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:27:48,434 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-23 20:27:48,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:48,435 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:27:48,435 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:27:48,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:27:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-23 20:27:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:27:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 20:27:48,441 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-11-23 20:27:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:48,441 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 20:27:48,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:27:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 20:27:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:27:48,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:48,442 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:48,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:48,647 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash -846091049, now seen corresponding path program 6 times [2019-11-23 20:27:48,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:48,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354511646] [2019-11-23 20:27:48,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:27:48,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354511646] [2019-11-23 20:27:48,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43857556] [2019-11-23 20:27:48,745 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:48,789 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:27:48,789 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:48,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:27:48,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:27:48,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:48,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:27:48,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528385526] [2019-11-23 20:27:48,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:27:48,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:27:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:48,811 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-11-23 20:27:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:48,866 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-11-23 20:27:48,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:27:48,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-23 20:27:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:48,868 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:27:48,868 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:27:48,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:27:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 20:27:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:27:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 20:27:48,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2019-11-23 20:27:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:48,877 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 20:27:48,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:27:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 20:27:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:27:48,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:48,878 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,085 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash 401698902, now seen corresponding path program 7 times [2019-11-23 20:27:49,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977111750] [2019-11-23 20:27:49,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:27:49,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977111750] [2019-11-23 20:27:49,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203005786] [2019-11-23 20:27:49,224 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:27:49,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:27:49,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:49,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:27:49,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243995934] [2019-11-23 20:27:49,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:27:49,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:27:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:49,306 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2019-11-23 20:27:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,365 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2019-11-23 20:27:49,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:27:49,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-11-23 20:27:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,367 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:27:49,367 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:27:49,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:27:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:27:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:27:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 20:27:49,373 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-23 20:27:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,373 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 20:27:49,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:27:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 20:27:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:27:49,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,374 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,586 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,586 INFO L82 PathProgramCache]: Analyzing trace with hash -88565897, now seen corresponding path program 8 times [2019-11-23 20:27:49,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966615397] [2019-11-23 20:27:49,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:27:49,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966615397] [2019-11-23 20:27:49,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491299376] [2019-11-23 20:27:49,749 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:49,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:49,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:27:49,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:27:49,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:49,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:27:49,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95103415] [2019-11-23 20:27:49,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:27:49,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:27:49,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:49,830 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2019-11-23 20:27:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,890 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-23 20:27:49,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:27:49,890 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2019-11-23 20:27:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,891 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:27:49,891 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:27:49,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:27:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-23 20:27:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:27:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-23 20:27:49,897 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-11-23 20:27:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,898 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-23 20:27:49,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:27:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-23 20:27:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:27:49,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,899 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,103 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1068425418, now seen corresponding path program 9 times [2019-11-23 20:27:50,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249405053] [2019-11-23 20:27:50,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:27:50,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249405053] [2019-11-23 20:27:50,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802738392] [2019-11-23 20:27:50,261 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:27:50,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:50,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:27:50,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:27:50,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:50,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2019-11-23 20:27:50,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260294912] [2019-11-23 20:27:50,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:27:50,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:50,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:27:50,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:50,452 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 14 states. [2019-11-23 20:27:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:50,538 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2019-11-23 20:27:50,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:27:50,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-23 20:27:50,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:50,541 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:27:50,541 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:27:50,542 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:27:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:27:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:27:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-23 20:27:50,552 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2019-11-23 20:27:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:50,552 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-23 20:27:50,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:27:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-23 20:27:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:27:50,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:50,554 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,755 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash 163359255, now seen corresponding path program 10 times [2019-11-23 20:27:50,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931133091] [2019-11-23 20:27:50,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:27:50,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931133091] [2019-11-23 20:27:50,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719709433] [2019-11-23 20:27:50,890 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,943 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:50,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:50,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:27:50,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:27:50,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:50,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:27:50,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332200231] [2019-11-23 20:27:50,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:27:50,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:50,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:27:50,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:50,968 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states. [2019-11-23 20:27:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:51,026 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2019-11-23 20:27:51,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:27:51,027 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2019-11-23 20:27:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:51,027 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:27:51,028 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:27:51,028 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:51,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:27:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-23 20:27:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:27:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-23 20:27:51,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-11-23 20:27:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:51,038 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-23 20:27:51,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:27:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-23 20:27:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:27:51,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:51,040 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:51,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:51,245 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash 425322006, now seen corresponding path program 11 times [2019-11-23 20:27:51,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:51,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15303541] [2019-11-23 20:27:51,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:27:51,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15303541] [2019-11-23 20:27:51,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491363242] [2019-11-23 20:27:51,396 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:51,828 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:27:51,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:51,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:27:51,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:27:51,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:51,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:27:51,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102955197] [2019-11-23 20:27:51,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:27:51,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:51,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:27:51,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:27:51,849 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2019-11-23 20:27:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:51,941 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2019-11-23 20:27:51,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:27:51,941 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-11-23 20:27:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:51,942 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:27:51,942 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:27:51,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:27:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:27:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-23 20:27:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:27:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-23 20:27:51,950 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-11-23 20:27:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:51,950 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-23 20:27:51,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:27:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-23 20:27:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:27:51,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:51,958 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:52,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,159 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:52,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1597250377, now seen corresponding path program 12 times [2019-11-23 20:27:52,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:52,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504637898] [2019-11-23 20:27:52,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:27:52,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504637898] [2019-11-23 20:27:52,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473159363] [2019-11-23 20:27:52,327 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,774 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:27:52,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:52,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:27:52,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:27:52,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:52,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:27:52,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872418799] [2019-11-23 20:27:52,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:27:52,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:27:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:27:52,796 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2019-11-23 20:27:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:52,862 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-11-23 20:27:52,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:27:52,863 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2019-11-23 20:27:52,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:52,864 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:27:52,864 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:27:52,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:27:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:27:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:27:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:27:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-11-23 20:27:52,869 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2019-11-23 20:27:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:52,869 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-11-23 20:27:52,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:27:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-11-23 20:27:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:27:52,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:52,870 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:53,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,075 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1878902006, now seen corresponding path program 13 times [2019-11-23 20:27:53,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:53,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989718596] [2019-11-23 20:27:53,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:27:53,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989718596] [2019-11-23 20:27:53,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199154409] [2019-11-23 20:27:53,233 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:53,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:27:53,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:27:53,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:53,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:27:53,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516640959] [2019-11-23 20:27:53,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:27:53,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:53,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:27:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:53,304 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 17 states. [2019-11-23 20:27:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:53,372 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2019-11-23 20:27:53,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:27:53,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2019-11-23 20:27:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:53,373 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:27:53,373 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:27:53,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:27:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:27:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-23 20:27:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:27:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-11-23 20:27:53,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2019-11-23 20:27:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:53,385 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-11-23 20:27:53,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:27:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-11-23 20:27:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:27:53,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:53,386 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:53,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,587 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:53,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1720993623, now seen corresponding path program 14 times [2019-11-23 20:27:53,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:53,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61354077] [2019-11-23 20:27:53,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:27:53,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61354077] [2019-11-23 20:27:53,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703776670] [2019-11-23 20:27:53,798 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:53,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:53,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:27:53,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:27:53,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:53,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:27:53,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284958512] [2019-11-23 20:27:53,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:27:53,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:27:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:27:53,910 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 18 states. [2019-11-23 20:27:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:54,000 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-11-23 20:27:54,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:27:54,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2019-11-23 20:27:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:54,001 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:27:54,003 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:27:54,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:27:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:27:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-23 20:27:54,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:27:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-23 20:27:54,020 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-11-23 20:27:54,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:54,021 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-23 20:27:54,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:27:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-23 20:27:54,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:27:54,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:54,022 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:54,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:54,233 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1890499542, now seen corresponding path program 15 times [2019-11-23 20:27:54,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:54,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969407342] [2019-11-23 20:27:54,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:27:54,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969407342] [2019-11-23 20:27:54,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961429725] [2019-11-23 20:27:54,424 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:55,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:27:55,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:55,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:27:55,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-11-23 20:27:55,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:55,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:27:55,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771793955] [2019-11-23 20:27:55,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:27:55,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:55,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:27:55,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:27:55,189 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 19 states. [2019-11-23 20:27:55,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:55,265 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-11-23 20:27:55,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:27:55,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2019-11-23 20:27:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:55,266 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:27:55,266 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:27:55,267 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:27:55,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:27:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:27:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:27:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-11-23 20:27:55,272 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2019-11-23 20:27:55,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:55,272 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-11-23 20:27:55,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:27:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-11-23 20:27:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:27:55,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:55,273 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:55,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:55,478 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:55,478 INFO L82 PathProgramCache]: Analyzing trace with hash -498871817, now seen corresponding path program 16 times [2019-11-23 20:27:55,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:55,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304565057] [2019-11-23 20:27:55,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:27:55,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304565057] [2019-11-23 20:27:55,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254124596] [2019-11-23 20:27:55,689 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:55,734 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:55,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:55,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:27:55,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:27:55,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:55,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:27:55,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813806293] [2019-11-23 20:27:55,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:27:55,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:27:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:27:55,774 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 20 states. [2019-11-23 20:27:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:55,851 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2019-11-23 20:27:55,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:27:55,852 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2019-11-23 20:27:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:55,853 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:27:55,853 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:27:55,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:27:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:27:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-23 20:27:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:27:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-23 20:27:55,858 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2019-11-23 20:27:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:55,859 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-23 20:27:55,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:27:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-23 20:27:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:27:55,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:55,860 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:56,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:56,064 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:56,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1197394614, now seen corresponding path program 17 times [2019-11-23 20:27:56,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:56,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401606963] [2019-11-23 20:27:56,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:27:56,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401606963] [2019-11-23 20:27:56,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829179416] [2019-11-23 20:27:56,286 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:04,211 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:28:04,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:04,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:28:04,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:28:04,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:04,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:28:04,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794956880] [2019-11-23 20:28:04,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:28:04,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:04,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:28:04,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:28:04,238 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 21 states. [2019-11-23 20:28:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:04,313 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2019-11-23 20:28:04,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:28:04,313 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2019-11-23 20:28:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:04,314 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:28:04,314 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:28:04,315 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:28:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:28:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:28:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:28:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:28:04,320 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2019-11-23 20:28:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:04,320 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:28:04,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:28:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:28:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:28:04,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:04,321 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:04,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:04,529 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1535673495, now seen corresponding path program 18 times [2019-11-23 20:28:04,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:04,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302049416] [2019-11-23 20:28:04,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:28:04,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302049416] [2019-11-23 20:28:04,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984280372] [2019-11-23 20:28:04,764 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:08,480 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:28:08,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:08,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:28:08,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 18 proven. 171 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-11-23 20:28:08,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:08,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 23 [2019-11-23 20:28:08,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797998750] [2019-11-23 20:28:08,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:28:08,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:28:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:28:08,544 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 23 states. [2019-11-23 20:28:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:08,619 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2019-11-23 20:28:08,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:28:08,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2019-11-23 20:28:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:08,621 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:28:08,621 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:28:08,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:28:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:28:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:28:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:28:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-23 20:28:08,628 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2019-11-23 20:28:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:08,628 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-23 20:28:08,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:28:08,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-23 20:28:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:28:08,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:08,629 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:08,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:08,835 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:08,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1082134122, now seen corresponding path program 19 times [2019-11-23 20:28:08,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:08,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683168609] [2019-11-23 20:28:08,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-23 20:28:09,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683168609] [2019-11-23 20:28:09,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856718359] [2019-11-23 20:28:09,053 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:09,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:28:09,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-23 20:28:09,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:09,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:28:09,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334509589] [2019-11-23 20:28:09,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:28:09,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:28:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:28:09,128 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 23 states. [2019-11-23 20:28:09,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:09,210 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2019-11-23 20:28:09,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:28:09,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2019-11-23 20:28:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:09,211 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:28:09,211 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:28:09,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:28:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:28:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-23 20:28:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:28:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-23 20:28:09,217 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2019-11-23 20:28:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:09,217 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-23 20:28:09,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:28:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-23 20:28:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:28:09,218 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:09,218 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:09,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,422 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:09,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1164943561, now seen corresponding path program 20 times [2019-11-23 20:28:09,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:09,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706617391] [2019-11-23 20:28:09,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:09,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706617391] [2019-11-23 20:28:09,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677624909] [2019-11-23 20:28:09,678 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:09,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:09,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:28:09,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:09,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:09,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:28:09,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748075026] [2019-11-23 20:28:09,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:28:09,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:28:09,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:28:09,754 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 24 states. [2019-11-23 20:28:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:09,848 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2019-11-23 20:28:09,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:28:09,849 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2019-11-23 20:28:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:09,850 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:28:09,850 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:28:09,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:28:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:28:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-23 20:28:09,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:28:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-23 20:28:09,860 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2019-11-23 20:28:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:09,860 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-23 20:28:09,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:28:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-23 20:28:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:28:09,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:09,862 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:10,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:10,071 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:10,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1677996150, now seen corresponding path program 21 times [2019-11-23 20:28:10,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:10,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235367759] [2019-11-23 20:28:10,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-23 20:28:10,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235367759] [2019-11-23 20:28:10,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640504312] [2019-11-23 20:28:10,338 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:14,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:28:14,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:14,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:28:14,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 231 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:15,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:15,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 26 [2019-11-23 20:28:15,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325269416] [2019-11-23 20:28:15,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:28:15,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:28:15,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:28:15,016 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 26 states. [2019-11-23 20:28:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:15,095 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2019-11-23 20:28:15,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:28:15,096 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2019-11-23 20:28:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:15,097 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:28:15,097 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:28:15,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:28:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:28:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:28:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:28:15,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-23 20:28:15,106 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2019-11-23 20:28:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:15,109 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-23 20:28:15,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:28:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-23 20:28:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:28:15,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:15,110 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:15,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:15,311 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:15,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1745445335, now seen corresponding path program 22 times [2019-11-23 20:28:15,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:15,312 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671224482] [2019-11-23 20:28:15,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:28:15,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671224482] [2019-11-23 20:28:15,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667296686] [2019-11-23 20:28:15,568 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:15,619 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:15,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:15,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:28:15,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:28:15,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:15,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:28:15,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012498218] [2019-11-23 20:28:15,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:28:15,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:28:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:28:15,636 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2019-11-23 20:28:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:15,756 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2019-11-23 20:28:15,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:28:15,756 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2019-11-23 20:28:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:15,757 INFO L225 Difference]: With dead ends: 89 [2019-11-23 20:28:15,757 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:28:15,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:28:15,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:28:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-23 20:28:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:28:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-23 20:28:15,761 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2019-11-23 20:28:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:15,762 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-23 20:28:15,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:28:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-23 20:28:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:28:15,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:15,763 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:15,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:15,966 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1621260458, now seen corresponding path program 23 times [2019-11-23 20:28:15,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:15,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119546958] [2019-11-23 20:28:15,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 20:28:16,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119546958] [2019-11-23 20:28:16,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832886851] [2019-11-23 20:28:16,299 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:36,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 20:28:36,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:36,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:28:36,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 20:28:36,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:36,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:28:36,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141286273] [2019-11-23 20:28:36,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:28:36,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:36,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:28:36,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:28:36,293 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 27 states. [2019-11-23 20:28:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:36,409 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2019-11-23 20:28:36,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:28:36,410 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2019-11-23 20:28:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:36,411 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:28:36,411 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:28:36,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:28:36,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:28:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-23 20:28:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:28:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-23 20:28:36,414 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2019-11-23 20:28:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:36,414 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-23 20:28:36,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:28:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-23 20:28:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:28:36,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:36,415 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:36,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:36,624 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash 757173367, now seen corresponding path program 24 times [2019-11-23 20:28:36,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:36,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184768739] [2019-11-23 20:28:36,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:28:37,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184768739] [2019-11-23 20:28:37,092 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69488678] [2019-11-23 20:28:37,092 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:57,721 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:28:57,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:57,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:28:57,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:28:57,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:57,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:28:57,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828247841] [2019-11-23 20:28:57,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:28:57,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:57,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:28:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:28:57,754 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2019-11-23 20:28:57,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:57,864 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2019-11-23 20:28:57,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:28:57,865 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2019-11-23 20:28:57,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:57,866 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:28:57,866 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:28:57,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:28:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:28:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:28:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:28:57,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-11-23 20:28:57,871 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2019-11-23 20:28:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:57,871 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-11-23 20:28:57,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:28:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-11-23 20:28:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:28:57,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:57,872 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:58,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:58,073 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash -612501962, now seen corresponding path program 25 times [2019-11-23 20:28:58,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:58,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531314983] [2019-11-23 20:28:58,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 20:28:58,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531314983] [2019-11-23 20:28:58,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516771071] [2019-11-23 20:28:58,534 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:58,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:28:58,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 20:28:58,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:58,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:28:58,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550933998] [2019-11-23 20:28:58,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:28:58,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:58,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:28:58,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:28:58,610 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 29 states. [2019-11-23 20:28:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:58,693 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2019-11-23 20:28:58,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:28:58,694 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2019-11-23 20:28:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:58,695 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:28:58,695 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:28:58,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:28:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:28:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-23 20:28:58,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:28:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-11-23 20:28:58,700 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2019-11-23 20:28:58,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:58,700 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-11-23 20:28:58,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:28:58,700 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-11-23 20:28:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:28:58,701 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:58,701 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:58,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:58,905 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:58,905 INFO L82 PathProgramCache]: Analyzing trace with hash 327606039, now seen corresponding path program 26 times [2019-11-23 20:28:58,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:58,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643923462] [2019-11-23 20:28:58,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:28:59,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643923462] [2019-11-23 20:28:59,301 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952914129] [2019-11-23 20:28:59,301 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:59,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:59,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:59,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:28:59,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-23 20:28:59,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:59,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:28:59,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702645201] [2019-11-23 20:28:59,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:28:59,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:59,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:28:59,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:28:59,374 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 30 states. [2019-11-23 20:28:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:59,451 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2019-11-23 20:28:59,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:28:59,452 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2019-11-23 20:28:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:59,453 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:28:59,453 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:28:59,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:28:59,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:28:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-11-23 20:28:59,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:28:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-11-23 20:28:59,456 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2019-11-23 20:28:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:59,457 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-11-23 20:28:59,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:28:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-11-23 20:28:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:28:59,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:59,458 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:59,658 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:59,658 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:59,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:59,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1579713258, now seen corresponding path program 27 times [2019-11-23 20:28:59,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:59,660 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490932985] [2019-11-23 20:28:59,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-11-23 20:29:00,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490932985] [2019-11-23 20:29:00,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911199138] [2019-11-23 20:29:00,068 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:14,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:29:14,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:14,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:29:14,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-11-23 20:29:14,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:14,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:29:14,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320551230] [2019-11-23 20:29:14,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:29:14,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:14,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:29:14,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:29:14,500 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 31 states. [2019-11-23 20:29:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:14,582 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2019-11-23 20:29:14,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:29:14,583 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 63 [2019-11-23 20:29:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:14,583 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:29:14,583 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:29:14,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:29:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:29:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-23 20:29:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:29:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-11-23 20:29:14,586 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2019-11-23 20:29:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:14,587 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-11-23 20:29:14,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:29:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-11-23 20:29:14,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:29:14,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:14,587 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:14,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:14,788 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:14,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1164401079, now seen corresponding path program 28 times [2019-11-23 20:29:14,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:14,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836357850] [2019-11-23 20:29:14,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 20:29:15,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836357850] [2019-11-23 20:29:15,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675546733] [2019-11-23 20:29:15,222 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:15,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:15,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:15,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:29:15,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 20:29:15,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:15,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:29:15,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362658541] [2019-11-23 20:29:15,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:29:15,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:15,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:29:15,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:29:15,335 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 32 states. [2019-11-23 20:29:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:15,501 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2019-11-23 20:29:15,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:29:15,501 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2019-11-23 20:29:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:15,502 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:29:15,502 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:29:15,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:29:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:29:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-23 20:29:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:29:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-11-23 20:29:15,506 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2019-11-23 20:29:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:15,507 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-11-23 20:29:15,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:29:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-11-23 20:29:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:29:15,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:15,507 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:15,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:15,708 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1151591434, now seen corresponding path program 29 times [2019-11-23 20:29:15,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:15,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689482539] [2019-11-23 20:29:15,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-11-23 20:29:16,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689482539] [2019-11-23 20:29:16,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000189246] [2019-11-23 20:29:16,132 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true