java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:59:23,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:59:23,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:59:23,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:59:23,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:59:23,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:59:23,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:59:23,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:59:23,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:59:23,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:59:23,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:59:23,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:59:23,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:59:23,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:59:23,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:59:23,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:59:23,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:59:23,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:59:23,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:59:23,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:59:23,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:59:23,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:59:23,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:59:23,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:59:23,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:59:23,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:59:23,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:59:23,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:59:23,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:59:23,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:59:23,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:59:23,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:59:23,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:59:23,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:59:23,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:59:23,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:59:23,137 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 [2019-09-20 12:59:23,164 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:59:23,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:59:23,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:59:23,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:59:23,166 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:59:23,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:59:23,170 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:59:23,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:59:23,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:59:23,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:59:23,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:59:23,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:59:23,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:59:23,171 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:59:23,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:59:23,173 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:59:23,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:59:23,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:59:23,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:59:23,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:59:23,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:59:23,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:23,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:59:23,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:59:23,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:59:23,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:59:23,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:59:23,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:59:23,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:59:23,223 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:59:23,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:59:23,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:59:23,245 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:59:23,245 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:59:23,246 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2019-09-20 12:59:23,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787ed67ee/e61c696c16ec4cd593f3e9e30f37868e/FLAG3059423cf [2019-09-20 12:59:23,756 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:59:23,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2019-09-20 12:59:23,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787ed67ee/e61c696c16ec4cd593f3e9e30f37868e/FLAG3059423cf [2019-09-20 12:59:24,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787ed67ee/e61c696c16ec4cd593f3e9e30f37868e [2019-09-20 12:59:24,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:59:24,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:59:24,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:24,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:59:24,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:59:24,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242ad12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24, skipping insertion in model container [2019-09-20 12:59:24,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,168 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:59:24,187 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:59:24,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:24,436 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:59:24,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:24,490 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:59:24,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24 WrapperNode [2019-09-20 12:59:24,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:24,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:59:24,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:59:24,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:59:24,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (1/1) ... [2019-09-20 12:59:24,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:59:24,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:59:24,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:59:24,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:59:24,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (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 [2019-09-20 12:59:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:59:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:59:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:59:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:59:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:59:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:59:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:59:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:59:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 12:59:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:59:24,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:59:24,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:59:24,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:59:24,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:59:24,918 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:59:24,918 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 12:59:24,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:24 BoogieIcfgContainer [2019-09-20 12:59:24,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:59:24,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:59:24,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:59:24,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:59:24,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:59:24" (1/3) ... [2019-09-20 12:59:24,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f804813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:24, skipping insertion in model container [2019-09-20 12:59:24,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:24" (2/3) ... [2019-09-20 12:59:24,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f804813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:24, skipping insertion in model container [2019-09-20 12:59:24,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:24" (3/3) ... [2019-09-20 12:59:24,929 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2019-09-20 12:59:24,939 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:59:24,947 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:59:24,972 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:59:25,018 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:59:25,020 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:59:25,020 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:59:25,020 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:59:25,020 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:59:25,021 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:59:25,021 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:59:25,021 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:59:25,021 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:59:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-20 12:59:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 12:59:25,050 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:25,051 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:25,053 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2019-09-20 12:59:25,064 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:25,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:25,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:25,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:25,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:25,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:59:25,223 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:59:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:59:25,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:25,241 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-20 12:59:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:25,265 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-09-20 12:59:25,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:59:25,267 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-20 12:59:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:25,273 INFO L225 Difference]: With dead ends: 50 [2019-09-20 12:59:25,274 INFO L226 Difference]: Without dead ends: 24 [2019-09-20 12:59:25,276 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:59:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-20 12:59:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-20 12:59:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-20 12:59:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-20 12:59:25,313 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-09-20 12:59:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:25,313 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-20 12:59:25,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:59:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-20 12:59:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-20 12:59:25,315 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:25,315 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:25,315 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:25,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:25,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2019-09-20 12:59:25,316 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:25,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:25,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:25,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:59:25,387 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:25,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:59:25,389 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:59:25,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:59:25,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:59:25,390 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-09-20 12:59:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:25,453 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-09-20 12:59:25,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:59:25,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-20 12:59:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:25,455 INFO L225 Difference]: With dead ends: 45 [2019-09-20 12:59:25,455 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:59:25,457 INFO L636 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 [2019-09-20 12:59:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:59:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-09-20 12:59:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-20 12:59:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-20 12:59:25,464 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-09-20 12:59:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:25,464 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-20 12:59:25,464 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:59:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-20 12:59:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-20 12:59:25,465 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:25,465 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:25,465 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2019-09-20 12:59:25,466 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:25,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:25,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:25,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:59:25,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:25,556 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:25,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:25,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:25,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 12:59:25,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:25,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-20 12:59:25,693 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:59:25,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:59:25,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:25,694 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-09-20 12:59:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:25,877 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-09-20 12:59:25,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:59:25,878 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-09-20 12:59:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:25,881 INFO L225 Difference]: With dead ends: 61 [2019-09-20 12:59:25,882 INFO L226 Difference]: Without dead ends: 44 [2019-09-20 12:59:25,883 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-09-20 12:59:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-20 12:59:25,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-09-20 12:59:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 12:59:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-09-20 12:59:25,894 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2019-09-20 12:59:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:25,894 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-09-20 12:59:25,894 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:59:25,894 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-09-20 12:59:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-20 12:59:25,896 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:25,896 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:25,896 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1242247089, now seen corresponding path program 1 times [2019-09-20 12:59:25,897 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:25,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:25,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:25,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-20 12:59:26,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:26,118 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:26,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:26,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 12:59:26,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-20 12:59:26,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:26,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-09-20 12:59:26,280 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-20 12:59:26,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-20 12:59:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-09-20 12:59:26,281 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 15 states. [2019-09-20 12:59:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:26,876 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2019-09-20 12:59:26,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-20 12:59:26,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2019-09-20 12:59:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:26,881 INFO L225 Difference]: With dead ends: 130 [2019-09-20 12:59:26,881 INFO L226 Difference]: Without dead ends: 104 [2019-09-20 12:59:26,883 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-09-20 12:59:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-20 12:59:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2019-09-20 12:59:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-20 12:59:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2019-09-20 12:59:26,912 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 36 [2019-09-20 12:59:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:26,912 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2019-09-20 12:59:26,912 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-20 12:59:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2019-09-20 12:59:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-20 12:59:26,916 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:26,916 INFO L407 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:26,917 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash -999025673, now seen corresponding path program 2 times [2019-09-20 12:59:26,917 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:26,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:26,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:26,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:26,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-20 12:59:27,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:27,279 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:27,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:27,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:27,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:27,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 12:59:27,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-09-20 12:59:27,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:27,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2019-09-20 12:59:27,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-20 12:59:27,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-20 12:59:27,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2019-09-20 12:59:27,564 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 26 states. [2019-09-20 12:59:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:29,037 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2019-09-20 12:59:29,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-20 12:59:29,038 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2019-09-20 12:59:29,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:29,040 INFO L225 Difference]: With dead ends: 271 [2019-09-20 12:59:29,040 INFO L226 Difference]: Without dead ends: 204 [2019-09-20 12:59:29,043 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1143, Invalid=3017, Unknown=0, NotChecked=0, Total=4160 [2019-09-20 12:59:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-09-20 12:59:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 151. [2019-09-20 12:59:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-20 12:59:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2019-09-20 12:59:29,071 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 56 [2019-09-20 12:59:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:29,072 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2019-09-20 12:59:29,072 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-20 12:59:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2019-09-20 12:59:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-20 12:59:29,074 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:29,074 INFO L407 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:29,074 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash 954308804, now seen corresponding path program 3 times [2019-09-20 12:59:29,076 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:29,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:29,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:29,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:29,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-20 12:59:29,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:29,534 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:29,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:29,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-20 12:59:29,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:29,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:29,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-09-20 12:59:29,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:29,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2019-09-20 12:59:29,697 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-20 12:59:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-20 12:59:29,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-20 12:59:29,699 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand 28 states. [2019-09-20 12:59:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:30,400 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2019-09-20 12:59:30,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 12:59:30,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2019-09-20 12:59:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:30,402 INFO L225 Difference]: With dead ends: 244 [2019-09-20 12:59:30,403 INFO L226 Difference]: Without dead ends: 173 [2019-09-20 12:59:30,404 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2019-09-20 12:59:30,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-20 12:59:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 106. [2019-09-20 12:59:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-20 12:59:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2019-09-20 12:59:30,418 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 81 [2019-09-20 12:59:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:30,418 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2019-09-20 12:59:30,418 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-20 12:59:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2019-09-20 12:59:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-20 12:59:30,420 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:30,420 INFO L407 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:30,421 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash -787338302, now seen corresponding path program 4 times [2019-09-20 12:59:30,421 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:30,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:30,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:30,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:30,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-09-20 12:59:30,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:30,568 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:30,592 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 12:59:30,669 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:59:30,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:30,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:59:30,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Stream closed [2019-09-20 12:59:30,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:30,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2019-09-20 12:59:30,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-20 12:59:30,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-20 12:59:30,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-09-20 12:59:30,862 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 25 states. [2019-09-20 12:59:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:31,455 INFO L93 Difference]: Finished difference Result 262 states and 320 transitions. [2019-09-20 12:59:31,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-20 12:59:31,456 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-09-20 12:59:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:31,458 INFO L225 Difference]: With dead ends: 262 [2019-09-20 12:59:31,458 INFO L226 Difference]: Without dead ends: 189 [2019-09-20 12:59:31,460 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2019-09-20 12:59:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-09-20 12:59:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2019-09-20 12:59:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-09-20 12:59:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2019-09-20 12:59:31,479 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 81 [2019-09-20 12:59:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:31,479 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2019-09-20 12:59:31,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-20 12:59:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2019-09-20 12:59:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-20 12:59:31,482 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:31,482 INFO L407 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:31,482 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash -273507723, now seen corresponding path program 5 times [2019-09-20 12:59:31,483 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:31,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:31,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:31,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:31,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2019-09-20 12:59:31,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:31,770 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:31,797 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1