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/loops/compact.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:19:43,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:19:43,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:19:43,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:19:43,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:19:43,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:19:43,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:19:43,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:19:43,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:19:43,070 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:19:43,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:19:43,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:19:43,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:19:43,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:19:43,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:19:43,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:19:43,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:19:43,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:19:43,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:19:43,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:19:43,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:19:43,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:19:43,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:19:43,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:19:43,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-03 19:19:43,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-03 19:19:43,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-03 19:19:43,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-03 19:19:43,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-03 19:19:43,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-03 19:19:43,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 19:19:43,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 19:19:43,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 19:19:43,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 19:19:43,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 19:19:43,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 19:19:43,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 19:19:43,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 19:19:43,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:19:43,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:19:43,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:19:43,119 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 [2019-09-03 19:19:43,152 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:19:43,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:19:43,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:19:43,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:19:43,155 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:19:43,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:19:43,156 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:19:43,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:19:43,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:19:43,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:19:43,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:19:43,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:19:43,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:19:43,158 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:19:43,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:19:43,159 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:19:43,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:19:43,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:19:43,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:19:43,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:19:43,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:19:43,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:19:43,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:19:43,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:19:43,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:19:43,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:19:43,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:19:43,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:19:43,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:19:43,217 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:19:43,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:19:43,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:19:43,241 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:19:43,242 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:19:43,243 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/compact.c [2019-09-03 19:19:43,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a981b6c/d31e7a7bdfad45f8b31c5a9af011e43e/FLAG8344b1e84 [2019-09-03 19:19:43,742 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:19:43,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/compact.c [2019-09-03 19:19:43,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a981b6c/d31e7a7bdfad45f8b31c5a9af011e43e/FLAG8344b1e84 [2019-09-03 19:19:44,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01a981b6c/d31e7a7bdfad45f8b31c5a9af011e43e [2019-09-03 19:19:44,162 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:19:44,164 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:19:44,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:44,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:19:44,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:19:44,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@216b4d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44, skipping insertion in model container [2019-09-03 19:19:44,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,179 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:19:44,193 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:19:44,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:44,342 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:19:44,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:44,477 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:19:44,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44 WrapperNode [2019-09-03 19:19:44,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:44,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:19:44,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:19:44,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:19:44,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:19:44,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:19:44,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:19:44,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:19:44,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (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 [2019-09-03 19:19:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:19:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:19:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:19:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:19:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-03 19:19:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:19:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 19:19:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 19:19:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:19:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 19:19:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:19:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 19:19:44,791 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:19:44,791 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-03 19:19:44,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:44 BoogieIcfgContainer [2019-09-03 19:19:44,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:19:44,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:19:44,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:19:44,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:19:44,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:19:44" (1/3) ... [2019-09-03 19:19:44,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed2748e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:44, skipping insertion in model container [2019-09-03 19:19:44,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (2/3) ... [2019-09-03 19:19:44,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed2748e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:44, skipping insertion in model container [2019-09-03 19:19:44,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:44" (3/3) ... [2019-09-03 19:19:44,819 INFO L109 eAbstractionObserver]: Analyzing ICFG compact.c [2019-09-03 19:19:44,852 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:19:44,862 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:19:44,888 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:19:44,919 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:19:44,919 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:19:44,920 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:19:44,920 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:19:44,920 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:19:44,920 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:19:44,920 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:19:44,921 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:19:44,921 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:19:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-09-03 19:19:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 19:19:44,941 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:44,942 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:44,944 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash -384233600, now seen corresponding path program 1 times [2019-09-03 19:19:44,951 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:44,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:44,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:44,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:44,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:45,083 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:45,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:19:45,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:19:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:19:45,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:19:45,100 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-09-03 19:19:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,117 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-09-03 19:19:45,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:19:45,119 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 19:19:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,127 INFO L225 Difference]: With dead ends: 28 [2019-09-03 19:19:45,128 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 19:19:45,131 INFO L628 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 [2019-09-03 19:19:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 19:19:45,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 19:19:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 19:19:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-03 19:19:45,161 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-03 19:19:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,162 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-03 19:19:45,162 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:19:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-03 19:19:45,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 19:19:45,163 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,163 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,164 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,164 INFO L82 PathProgramCache]: Analyzing trace with hash -384412656, now seen corresponding path program 1 times [2019-09-03 19:19:45,164 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:45,229 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:45,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 19:19:45,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 19:19:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 19:19:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:19:45,232 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-09-03 19:19:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,288 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2019-09-03 19:19:45,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 19:19:45,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-03 19:19:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,290 INFO L225 Difference]: With dead ends: 25 [2019-09-03 19:19:45,291 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 19:19:45,292 INFO L628 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 [2019-09-03 19:19:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 19:19:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2019-09-03 19:19:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 19:19:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-09-03 19:19:45,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 10 [2019-09-03 19:19:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,298 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-09-03 19:19:45,298 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 19:19:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-09-03 19:19:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 19:19:45,299 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,299 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,299 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1313634531, now seen corresponding path program 1 times [2019-09-03 19:19:45,300 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:19:45,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:45,456 INFO L223 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) [2019-09-03 19:19:45,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 19:19:45,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:19:45,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:45,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-03 19:19:45,547 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 19:19:45,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 19:19:45,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:19:45,548 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2019-09-03 19:19:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,608 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2019-09-03 19:19:45,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 19:19:45,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-03 19:19:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,610 INFO L225 Difference]: With dead ends: 31 [2019-09-03 19:19:45,610 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 19:19:45,611 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:19:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 19:19:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-09-03 19:19:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 19:19:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-03 19:19:45,616 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2019-09-03 19:19:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,617 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-03 19:19:45,617 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 19:19:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-03 19:19:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 19:19:45,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,618 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,618 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1458887604, now seen corresponding path program 2 times [2019-09-03 19:19:45,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-03 19:19:45,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:45,747 INFO L223 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) [2019-09-03 19:19:45,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:45,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:19:45,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:45,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-03 19:19:45,801 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:19:45,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:45,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-03 19:19:45,840 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:19:45,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:19:45,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:19:45,841 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2019-09-03 19:19:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,933 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-09-03 19:19:45,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 19:19:45,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-09-03 19:19:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,935 INFO L225 Difference]: With dead ends: 39 [2019-09-03 19:19:45,935 INFO L226 Difference]: Without dead ends: 29 [2019-09-03 19:19:45,935 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:19:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-03 19:19:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-09-03 19:19:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-03 19:19:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-09-03 19:19:45,942 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2019-09-03 19:19:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,943 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-09-03 19:19:45,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:19:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-09-03 19:19:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 19:19:45,944 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,944 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,945 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash -152547009, now seen corresponding path program 3 times [2019-09-03 19:19:45,946 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:45,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 19:19:46,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:46,138 INFO L223 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) [2019-09-03 19:19:46,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:46,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 19:19:46,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:46,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 19:19:46,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 19:19:46,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:46,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-03 19:19:46,309 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:19:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:19:46,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:46,310 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2019-09-03 19:19:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:46,418 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-09-03 19:19:46,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:19:46,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-09-03 19:19:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:46,420 INFO L225 Difference]: With dead ends: 47 [2019-09-03 19:19:46,420 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 19:19:46,421 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 19:19:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-09-03 19:19:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 19:19:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-09-03 19:19:46,427 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2019-09-03 19:19:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:46,427 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-09-03 19:19:46,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:19:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-09-03 19:19:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-03 19:19:46,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:46,429 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:46,429 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:46,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2023633752, now seen corresponding path program 4 times [2019-09-03 19:19:46,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:46,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:46,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:46,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-03 19:19:46,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:46,618 INFO L223 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) [2019-09-03 19:19:46,635 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:46,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:19:46,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:46,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 19:19:46,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-03 19:19:46,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:46,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-03 19:19:46,713 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 19:19:46,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 19:19:46,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:19:46,714 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2019-09-03 19:19:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:46,849 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2019-09-03 19:19:46,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:19:46,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-09-03 19:19:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:46,850 INFO L225 Difference]: With dead ends: 55 [2019-09-03 19:19:46,851 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 19:19:46,851 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:19:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 19:19:46,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-09-03 19:19:46,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 19:19:46,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-09-03 19:19:46,858 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2019-09-03 19:19:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:46,858 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-09-03 19:19:46,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 19:19:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-09-03 19:19:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 19:19:46,860 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:46,860 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:46,860 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:46,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1510619547, now seen corresponding path program 5 times [2019-09-03 19:19:46,861 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:46,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:46,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:46,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-09-03 19:19:47,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:47,039 INFO L223 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) [2019-09-03 19:19:47,053 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:47,380 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-03 19:19:47,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:47,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 19:19:47,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-09-03 19:19:47,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:47,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-03 19:19:47,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 19:19:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 19:19:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:19:47,424 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 9 states. [2019-09-03 19:19:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:47,588 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2019-09-03 19:19:47,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 19:19:47,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-09-03 19:19:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:47,590 INFO L225 Difference]: With dead ends: 63 [2019-09-03 19:19:47,591 INFO L226 Difference]: Without dead ends: 44 [2019-09-03 19:19:47,591 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:19:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-03 19:19:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-09-03 19:19:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 19:19:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-09-03 19:19:47,598 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2019-09-03 19:19:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:47,599 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-09-03 19:19:47,599 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 19:19:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-09-03 19:19:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 19:19:47,600 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:47,600 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:47,601 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:47,601 INFO L82 PathProgramCache]: Analyzing trace with hash -468673796, now seen corresponding path program 6 times [2019-09-03 19:19:47,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:47,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:47,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:47,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:47,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-09-03 19:19:47,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:47,741 INFO L223 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 [2019-09-03 19:19:47,764 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:19:48,045 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 19:19:48,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:48,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-03 19:19:48,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:48,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:48,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2019-09-03 19:19:48,190 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 19:19:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 19:19:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-03 19:19:48,191 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 12 states. [2019-09-03 19:19:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:48,462 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-09-03 19:19:48,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 19:19:48,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2019-09-03 19:19:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:48,463 INFO L225 Difference]: With dead ends: 73 [2019-09-03 19:19:48,463 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 19:19:48,464 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:19:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 19:19:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-03 19:19:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-03 19:19:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-09-03 19:19:48,471 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 40 [2019-09-03 19:19:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:48,471 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-09-03 19:19:48,471 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 19:19:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-09-03 19:19:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-03 19:19:48,473 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:48,473 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:48,473 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:48,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1949674848, now seen corresponding path program 7 times [2019-09-03 19:19:48,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:48,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:48,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:48,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:48,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-09-03 19:19:48,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:48,636 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:48,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:48,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 19:19:48,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-09-03 19:19:48,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:48,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-03 19:19:48,723 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 19:19:48,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 19:19:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-03 19:19:48,724 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 12 states. [2019-09-03 19:19:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:49,004 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2019-09-03 19:19:49,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 19:19:49,005 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2019-09-03 19:19:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:49,006 INFO L225 Difference]: With dead ends: 87 [2019-09-03 19:19:49,006 INFO L226 Difference]: Without dead ends: 59 [2019-09-03 19:19:49,007 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-03 19:19:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-03 19:19:49,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2019-09-03 19:19:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-03 19:19:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-09-03 19:19:49,014 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2019-09-03 19:19:49,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:49,015 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-09-03 19:19:49,015 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 19:19:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-09-03 19:19:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-03 19:19:49,016 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:49,016 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:49,016 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash -496551341, now seen corresponding path program 8 times [2019-09-03 19:19:49,017 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:49,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:49,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:49,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-09-03 19:19:49,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:49,228 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:19:49,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:49,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:19:49,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:49,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 19:19:49,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:19:49,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:49,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-03 19:19:49,344 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 19:19:49,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 19:19:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:19:49,345 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 13 states. [2019-09-03 19:19:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:49,649 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2019-09-03 19:19:49,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 19:19:49,650 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2019-09-03 19:19:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:49,651 INFO L225 Difference]: With dead ends: 95 [2019-09-03 19:19:49,651 INFO L226 Difference]: Without dead ends: 64 [2019-09-03 19:19:49,652 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:19:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-03 19:19:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2019-09-03 19:19:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-03 19:19:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-09-03 19:19:49,658 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 55 [2019-09-03 19:19:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:49,659 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-09-03 19:19:49,659 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 19:19:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-09-03 19:19:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-03 19:19:49,660 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:49,660 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:49,661 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash -490104252, now seen corresponding path program 9 times [2019-09-03 19:19:49,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:49,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:49,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:49,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-09-03 19:19:49,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:49,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:19:49,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:52,663 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-09-03 19:19:52,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:52,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 19:19:52,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 19:19:52,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:52,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-03 19:19:52,743 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 19:19:52,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 19:19:52,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:19:52,744 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 14 states. [2019-09-03 19:19:53,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:53,193 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2019-09-03 19:19:53,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 19:19:53,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-09-03 19:19:53,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:53,195 INFO L225 Difference]: With dead ends: 103 [2019-09-03 19:19:53,195 INFO L226 Difference]: Without dead ends: 69 [2019-09-03 19:19:53,197 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:19:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-03 19:19:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-09-03 19:19:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-03 19:19:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-09-03 19:19:53,208 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 60 [2019-09-03 19:19:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:53,209 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-09-03 19:19:53,209 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 19:19:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-09-03 19:19:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-03 19:19:53,210 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:53,210 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:53,210 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash -660221265, now seen corresponding path program 10 times [2019-09-03 19:19:53,211 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:53,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:53,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:53,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:53,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-09-03 19:19:53,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:53,453 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:53,464 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:19:53,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:19:53,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:19:53,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-03 19:19:53,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-09-03 19:19:53,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:53,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-03 19:19:53,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 19:19:53,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 19:19:53,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:19:53,568 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 15 states. [2019-09-03 19:19:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:54,094 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2019-09-03 19:19:54,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 19:19:54,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2019-09-03 19:19:54,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:54,095 INFO L225 Difference]: With dead ends: 111 [2019-09-03 19:19:54,096 INFO L226 Difference]: Without dead ends: 74 [2019-09-03 19:19:54,097 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:19:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-03 19:19:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2019-09-03 19:19:54,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-03 19:19:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-09-03 19:19:54,104 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2019-09-03 19:19:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:54,105 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-09-03 19:19:54,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 19:19:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-09-03 19:19:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-03 19:19:54,106 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:54,106 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:54,106 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:54,107 INFO L82 PathProgramCache]: Analyzing trace with hash 9220584, now seen corresponding path program 11 times [2019-09-03 19:19:54,107 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:54,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:54,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:54,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:19:54,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-09-03 19:19:54,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:54,339 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:19:54,351 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:21:04,282 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-03 19:21:04,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:04,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 19:21:04,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-09-03 19:21:04,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:04,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-03 19:21:04,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 19:21:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 19:21:04,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:21:04,669 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 16 states. [2019-09-03 19:21:05,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:05,220 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2019-09-03 19:21:05,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 19:21:05,221 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2019-09-03 19:21:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:05,222 INFO L225 Difference]: With dead ends: 119 [2019-09-03 19:21:05,222 INFO L226 Difference]: Without dead ends: 79 [2019-09-03 19:21:05,223 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:21:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-03 19:21:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2019-09-03 19:21:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-03 19:21:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2019-09-03 19:21:05,257 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 70 [2019-09-03 19:21:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:05,257 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2019-09-03 19:21:05,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 19:21:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2019-09-03 19:21:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-03 19:21:05,259 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:05,259 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:05,259 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash -479102197, now seen corresponding path program 12 times [2019-09-03 19:21:05,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:05,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:05,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:05,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:05,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-09-03 19:21:05,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:05,565 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:21:05,596 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:14,010 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-09-03 19:21:14,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:14,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 19:21:14,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-03 19:21:14,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:14,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-03 19:21:14,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 19:21:14,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 19:21:14,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:21:14,193 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 17 states. [2019-09-03 19:21:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:14,847 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2019-09-03 19:21:14,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 19:21:14,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-09-03 19:21:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:14,849 INFO L225 Difference]: With dead ends: 127 [2019-09-03 19:21:14,850 INFO L226 Difference]: Without dead ends: 84 [2019-09-03 19:21:14,851 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:21:14,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-03 19:21:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2019-09-03 19:21:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-03 19:21:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2019-09-03 19:21:14,856 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 75 [2019-09-03 19:21:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:14,857 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2019-09-03 19:21:14,857 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 19:21:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2019-09-03 19:21:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-03 19:21:14,858 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:14,858 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:14,859 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -988685940, now seen corresponding path program 13 times [2019-09-03 19:21:14,859 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:14,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:14,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:14,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:14,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-09-03 19:21:15,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:15,153 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:21:15,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:15,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 19:21:15,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-09-03 19:21:15,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:15,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-03 19:21:15,282 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 19:21:15,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 19:21:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-03 19:21:15,283 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 18 states. [2019-09-03 19:21:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:15,974 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2019-09-03 19:21:15,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 19:21:15,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2019-09-03 19:21:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:15,976 INFO L225 Difference]: With dead ends: 135 [2019-09-03 19:21:15,976 INFO L226 Difference]: Without dead ends: 89 [2019-09-03 19:21:15,977 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-03 19:21:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-03 19:21:15,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-09-03 19:21:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-03 19:21:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2019-09-03 19:21:15,983 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 80 [2019-09-03 19:21:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:15,984 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2019-09-03 19:21:15,984 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 19:21:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2019-09-03 19:21:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-03 19:21:15,985 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:15,985 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:15,985 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:15,986 INFO L82 PathProgramCache]: Analyzing trace with hash -787745945, now seen corresponding path program 14 times [2019-09-03 19:21:15,986 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:15,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:15,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:15,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:21:15,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-03 19:21:16,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:16,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:16,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:21:16,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:21:16,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:16,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 19:21:16,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:21:16,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:16,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-03 19:21:16,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:21:16,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:21:16,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:21:16,472 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 19 states. [2019-09-03 19:21:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:17,225 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2019-09-03 19:21:17,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 19:21:17,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2019-09-03 19:21:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:17,227 INFO L225 Difference]: With dead ends: 143 [2019-09-03 19:21:17,227 INFO L226 Difference]: Without dead ends: 94 [2019-09-03 19:21:17,234 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:21:17,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-03 19:21:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2019-09-03 19:21:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-03 19:21:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2019-09-03 19:21:17,246 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 85 [2019-09-03 19:21:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:17,247 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2019-09-03 19:21:17,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:21:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2019-09-03 19:21:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-03 19:21:17,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:17,254 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:17,254 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:17,255 INFO L82 PathProgramCache]: Analyzing trace with hash -52997840, now seen corresponding path program 15 times [2019-09-03 19:21:17,255 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:17,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:17,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:17,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:17,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-09-03 19:21:17,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:17,742 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:21:17,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:22:17,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-03 19:22:17,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:22:17,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-03 19:22:17,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:22:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:22:17,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:22:17,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-03 19:22:17,610 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 19:22:17,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 19:22:17,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:22:17,611 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 20 states. [2019-09-03 19:22:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:22:18,508 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2019-09-03 19:22:18,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 19:22:18,508 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2019-09-03 19:22:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:22:18,510 INFO L225 Difference]: With dead ends: 151 [2019-09-03 19:22:18,510 INFO L226 Difference]: Without dead ends: 99 [2019-09-03 19:22:18,511 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:22:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-03 19:22:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2019-09-03 19:22:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-03 19:22:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2019-09-03 19:22:18,517 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2019-09-03 19:22:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:22:18,518 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2019-09-03 19:22:18,518 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 19:22:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2019-09-03 19:22:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-03 19:22:18,519 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:22:18,519 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:22:18,519 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:22:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:22:18,519 INFO L82 PathProgramCache]: Analyzing trace with hash -248054845, now seen corresponding path program 16 times [2019-09-03 19:22:18,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:22:18,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:22:18,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:18,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:22:18,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:22:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-09-03 19:22:19,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:22:19,127 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:22:19,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:22:19,228 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:22:19,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:22:19,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-03 19:22:19,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:22:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-09-03 19:22:19,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:22:19,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-03 19:22:19,291 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 19:22:19,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 19:22:19,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-03 19:22:19,294 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2019-09-03 19:22:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:22:20,295 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2019-09-03 19:22:20,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 19:22:20,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2019-09-03 19:22:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:22:20,298 INFO L225 Difference]: With dead ends: 159 [2019-09-03 19:22:20,298 INFO L226 Difference]: Without dead ends: 104 [2019-09-03 19:22:20,299 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-03 19:22:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-03 19:22:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-09-03 19:22:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-03 19:22:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2019-09-03 19:22:20,304 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 95 [2019-09-03 19:22:20,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:22:20,304 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2019-09-03 19:22:20,304 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 19:22:20,304 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2019-09-03 19:22:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-03 19:22:20,305 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:22:20,305 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:22:20,305 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:22:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:22:20,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2065999660, now seen corresponding path program 17 times [2019-09-03 19:22:20,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:22:20,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:22:20,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:20,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:22:20,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:22:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-09-03 19:22:20,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:22:20,744 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:22:20,759 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:24:48,674 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-03 19:24:48,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:24:48,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-03 19:24:48,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:24:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-09-03 19:24:48,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:24:48,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-03 19:24:48,897 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 19:24:48,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 19:24:48,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2019-09-03 19:24:48,898 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 22 states. [2019-09-03 19:24:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:24:49,970 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2019-09-03 19:24:49,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 19:24:49,971 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2019-09-03 19:24:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:24:49,972 INFO L225 Difference]: With dead ends: 167 [2019-09-03 19:24:49,972 INFO L226 Difference]: Without dead ends: 109 [2019-09-03 19:24:49,975 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2019-09-03 19:24:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-03 19:24:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2019-09-03 19:24:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-03 19:24:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2019-09-03 19:24:49,982 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 100 [2019-09-03 19:24:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:24:49,986 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2019-09-03 19:24:49,986 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 19:24:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2019-09-03 19:24:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-03 19:24:49,989 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:24:49,989 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:24:49,989 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:24:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:24:49,990 INFO L82 PathProgramCache]: Analyzing trace with hash -248228833, now seen corresponding path program 18 times [2019-09-03 19:24:49,990 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:24:49,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:24:49,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:49,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:24:49,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:24:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:24:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-09-03 19:24:50,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:24:50,418 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:24:50,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:26:56,671 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-09-03 19:26:56,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:26:56,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-03 19:26:56,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:26:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-03 19:26:56,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:26:56,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-03 19:26:56,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 19:26:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 19:26:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:26:56,918 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 23 states. [2019-09-03 19:26:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:26:58,107 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2019-09-03 19:26:58,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 19:26:58,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2019-09-03 19:26:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:26:58,109 INFO L225 Difference]: With dead ends: 175 [2019-09-03 19:26:58,109 INFO L226 Difference]: Without dead ends: 114 [2019-09-03 19:26:58,110 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:26:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-03 19:26:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2019-09-03 19:26:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-03 19:26:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2019-09-03 19:26:58,115 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 105 [2019-09-03 19:26:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:26:58,115 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2019-09-03 19:26:58,115 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 19:26:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2019-09-03 19:26:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-03 19:26:58,116 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:26:58,116 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:26:58,117 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:26:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:26:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1855729784, now seen corresponding path program 19 times [2019-09-03 19:26:58,117 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:26:58,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:26:58,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:26:58,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:26:58,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:26:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:26:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-09-03 19:26:58,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:26:58,569 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:26:58,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:26:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:26:58,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 19:26:58,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:26:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-09-03 19:26:58,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:26:58,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-03 19:26:58,735 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 19:26:58,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 19:26:58,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2019-09-03 19:26:58,735 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 24 states. [2019-09-03 19:26:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:26:59,940 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2019-09-03 19:26:59,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 19:26:59,940 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2019-09-03 19:26:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:26:59,942 INFO L225 Difference]: With dead ends: 183 [2019-09-03 19:26:59,942 INFO L226 Difference]: Without dead ends: 119 [2019-09-03 19:26:59,943 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2019-09-03 19:26:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-03 19:26:59,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2019-09-03 19:26:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-03 19:26:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2019-09-03 19:26:59,948 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 110 [2019-09-03 19:26:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:26:59,949 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2019-09-03 19:26:59,949 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 19:26:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2019-09-03 19:26:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-03 19:26:59,950 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:26:59,950 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:26:59,950 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:26:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:26:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1211777925, now seen corresponding path program 20 times [2019-09-03 19:26:59,951 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:26:59,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:26:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:26:59,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:26:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:26:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:27:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-09-03 19:27:00,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:27:00,374 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:27:00,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:27:00,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:27:00,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:27:00,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-03 19:27:00,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:27:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-09-03 19:27:00,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:27:00,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-03 19:27:00,527 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 19:27:00,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 19:27:00,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2019-09-03 19:27:00,528 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand 25 states. [2019-09-03 19:27:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:27:01,906 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2019-09-03 19:27:01,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 19:27:01,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2019-09-03 19:27:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:27:01,909 INFO L225 Difference]: With dead ends: 191 [2019-09-03 19:27:01,910 INFO L226 Difference]: Without dead ends: 124 [2019-09-03 19:27:01,910 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2019-09-03 19:27:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-03 19:27:01,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2019-09-03 19:27:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-03 19:27:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2019-09-03 19:27:01,916 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 115 [2019-09-03 19:27:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:27:01,917 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2019-09-03 19:27:01,917 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 19:27:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2019-09-03 19:27:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-03 19:27:01,918 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:27:01,918 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:27:01,918 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:27:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:27:01,919 INFO L82 PathProgramCache]: Analyzing trace with hash 605558812, now seen corresponding path program 21 times [2019-09-03 19:27:01,919 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:27:01,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:27:01,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:01,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:27:01,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:27:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:27:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-09-03 19:27:02,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:27:02,365 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:27:02,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:29:14,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2019-09-03 19:29:14,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:29:14,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-03 19:29:14,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:29:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-09-03 19:29:14,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:29:14,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-03 19:29:14,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 19:29:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 19:29:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:29:14,816 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 26 states. [2019-09-03 19:29:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:29:16,316 INFO L93 Difference]: Finished difference Result 199 states and 202 transitions. [2019-09-03 19:29:16,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 19:29:16,317 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 120 [2019-09-03 19:29:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:29:16,318 INFO L225 Difference]: With dead ends: 199 [2019-09-03 19:29:16,318 INFO L226 Difference]: Without dead ends: 129 [2019-09-03 19:29:16,319 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:29:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-03 19:29:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-09-03 19:29:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-03 19:29:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2019-09-03 19:29:16,325 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 120 [2019-09-03 19:29:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:29:16,325 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2019-09-03 19:29:16,325 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 19:29:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2019-09-03 19:29:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-03 19:29:16,326 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:29:16,326 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:29:16,327 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:29:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:29:16,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1093465303, now seen corresponding path program 22 times [2019-09-03 19:29:16,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:29:16,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:29:16,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:16,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:29:16,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:29:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-09-03 19:29:16,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:29:16,802 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:29:16,814 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:29:16,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:29:16,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:29:16,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 49 conjunts are in the unsatisfiable core [2019-09-03 19:29:16,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:29:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-09-03 19:29:17,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:29:17,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-03 19:29:17,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 19:29:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 19:29:17,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2019-09-03 19:29:17,005 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 27 states. [2019-09-03 19:29:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:29:18,567 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2019-09-03 19:29:18,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 19:29:18,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2019-09-03 19:29:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:29:18,569 INFO L225 Difference]: With dead ends: 207 [2019-09-03 19:29:18,570 INFO L226 Difference]: Without dead ends: 134 [2019-09-03 19:29:18,571 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2019-09-03 19:29:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-03 19:29:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2019-09-03 19:29:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-03 19:29:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2019-09-03 19:29:18,576 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 125 [2019-09-03 19:29:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:29:18,576 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2019-09-03 19:29:18,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 19:29:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2019-09-03 19:29:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-03 19:29:18,578 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:29:18,578 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:29:18,578 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:29:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:29:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1949478976, now seen corresponding path program 23 times [2019-09-03 19:29:18,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:29:18,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:29:18,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:18,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:29:18,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:29:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:29:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-09-03 19:29:19,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:29:19,099 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:29:19,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:32:41,757 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-03 19:32:41,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:32:41,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-03 19:32:41,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:32:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-03 19:32:41,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:32:41,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-03 19:32:41,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 19:32:41,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 19:32:41,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-03 19:32:41,916 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 28 states. [2019-09-03 19:32:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:32:43,720 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2019-09-03 19:32:43,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 19:32:43,722 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 130 [2019-09-03 19:32:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:32:43,723 INFO L225 Difference]: With dead ends: 215 [2019-09-03 19:32:43,724 INFO L226 Difference]: Without dead ends: 139 [2019-09-03 19:32:43,724 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-03 19:32:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-03 19:32:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2019-09-03 19:32:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-03 19:32:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2019-09-03 19:32:43,730 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 130 [2019-09-03 19:32:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:32:43,730 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2019-09-03 19:32:43,730 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 19:32:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2019-09-03 19:32:43,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-03 19:32:43,731 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:32:43,732 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:32:43,732 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:32:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:32:43,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2066464051, now seen corresponding path program 24 times [2019-09-03 19:32:43,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:32:43,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:32:43,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:43,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:32:43,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:32:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:32:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-09-03 19:32:44,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:32:44,345 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:32:44,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000