java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:55,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:55,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:55,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:55,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:55,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:55,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:55,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:55,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:55,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:55,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:55,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:55,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:55,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:55,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:55,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:55,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:55,144 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:55,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:55,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:55,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:55,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:55,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:55,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:55,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:55,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:55,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:55,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:55,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:55,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:55,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:55,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:55,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:55,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:55,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:55,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:55,179 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 [2019-10-14 21:46:55,213 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:55,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:55,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:55,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:55,215 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:55,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:55,215 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:55,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:55,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:55,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:55,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:55,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:55,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:55,217 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:55,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:55,217 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:55,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:55,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:55,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:55,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:55,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:55,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:55,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:55,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:55,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:55,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:55,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:55,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:55,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:55,525 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:55,538 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:55,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:55,544 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:55,544 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:55,545 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-10-14 21:46:55,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791549f2d/d5d405c12dba4bd58654384fb71cba30/FLAG17597201f [2019-10-14 21:46:56,085 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:56,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-10-14 21:46:56,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791549f2d/d5d405c12dba4bd58654384fb71cba30/FLAG17597201f [2019-10-14 21:46:56,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791549f2d/d5d405c12dba4bd58654384fb71cba30 [2019-10-14 21:46:56,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:56,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:56,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:56,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:56,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:56,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65982a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56, skipping insertion in model container [2019-10-14 21:46:56,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,470 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:56,488 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:56,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:56,697 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:56,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:56,738 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:56,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56 WrapperNode [2019-10-14 21:46:56,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:56,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:56,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:56,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:56,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (1/1) ... [2019-10-14 21:46:56,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:56,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:56,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:56,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:56,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (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 [2019-10-14 21:46:56,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:56,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:56,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:56,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:56,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:56,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:56,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:56,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:56,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:56,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:56,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:57,189 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:57,189 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:57,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:57 BoogieIcfgContainer [2019-10-14 21:46:57,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:57,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:57,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:57,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:57,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:56" (1/3) ... [2019-10-14 21:46:57,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b7de91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:57, skipping insertion in model container [2019-10-14 21:46:57,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:56" (2/3) ... [2019-10-14 21:46:57,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b7de91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:57, skipping insertion in model container [2019-10-14 21:46:57,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:57" (3/3) ... [2019-10-14 21:46:57,201 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2019-10-14 21:46:57,211 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:57,219 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:57,233 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:57,256 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:57,256 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:57,256 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:57,256 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:57,256 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:57,257 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:57,257 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:57,257 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 21:46:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:57,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,278 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:57,280 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-10-14 21:46:57,292 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923503946] [2019-10-14 21:46:57,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:57,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923503946] [2019-10-14 21:46:57,460 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:57,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:57,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824010288] [2019-10-14 21:46:57,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:57,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:57,482 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-14 21:46:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:57,575 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-10-14 21:46:57,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:57,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:46:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:57,585 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:46:57,586 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 21:46:57,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 21:46:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 21:46:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 21:46:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-14 21:46:57,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-10-14 21:46:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:57,627 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-14 21:46:57,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-14 21:46:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:57,629 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,629 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:57,629 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-10-14 21:46:57,630 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067930303] [2019-10-14 21:46:57,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:57,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067930303] [2019-10-14 21:46:57,719 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:57,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:57,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814231478] [2019-10-14 21:46:57,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:57,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:57,722 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-10-14 21:46:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:57,821 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-14 21:46:57,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:57,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:46:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:57,823 INFO L225 Difference]: With dead ends: 32 [2019-10-14 21:46:57,823 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:46:57,825 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:46:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:46:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:46:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 21:46:57,836 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-14 21:46:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:57,837 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 21:46:57,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 21:46:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:57,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,839 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:57,839 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:57,839 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-10-14 21:46:57,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138921848] [2019-10-14 21:46:57,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:57,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138921848] [2019-10-14 21:46:57,916 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:57,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:57,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603336926] [2019-10-14 21:46:57,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:57,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:57,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:57,921 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-10-14 21:46:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,018 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 21:46:58,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:58,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:46:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,023 INFO L225 Difference]: With dead ends: 34 [2019-10-14 21:46:58,023 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:46:58,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:46:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-10-14 21:46:58,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:46:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 21:46:58,040 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-10-14 21:46:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,040 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 21:46:58,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 21:46:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:46:58,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,043 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,043 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,044 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-10-14 21:46:58,044 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119656650] [2019-10-14 21:46:58,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,045 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:58,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119656650] [2019-10-14 21:46:58,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247056250] [2019-10-14 21:46:58,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:58,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:58,265 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:58,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:46:58,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298931747] [2019-10-14 21:46:58,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:58,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:58,267 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-10-14 21:46:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,403 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:46:58,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:58,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-14 21:46:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,405 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:46:58,405 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:46:58,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:46:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-10-14 21:46:58,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:46:58,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:46:58,413 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-10-14 21:46:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,423 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:46:58,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:46:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:58,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,425 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,630 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-10-14 21:46:58,631 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991891759] [2019-10-14 21:46:58,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,632 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:46:58,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991891759] [2019-10-14 21:46:58,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967722653] [2019-10-14 21:46:58,741 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:58,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:58,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:58,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:58,828 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:58,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-14 21:46:58,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420208613] [2019-10-14 21:46:58,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:58,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:58,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:58,830 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-10-14 21:46:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,967 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-10-14 21:46:58,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:46:58,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-10-14 21:46:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,970 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:46:58,970 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:46:58,971 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:46:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-10-14 21:46:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:46:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 21:46:58,978 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-10-14 21:46:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,978 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 21:46:58,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 21:46:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:46:58,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,979 INFO L380 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,187 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-10-14 21:46:59,188 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459354118] [2019-10-14 21:46:59,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:59,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459354118] [2019-10-14 21:46:59,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508482817] [2019-10-14 21:46:59,331 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:59,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:59,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:59,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:59,414 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:59,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:46:59,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711004195] [2019-10-14 21:46:59,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:46:59,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:46:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:59,416 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-10-14 21:46:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:59,531 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-10-14 21:46:59,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:59,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:46:59,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:59,533 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:46:59,533 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:46:59,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:46:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:46:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-10-14 21:46:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:46:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 21:46:59,547 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-10-14 21:46:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:59,547 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 21:46:59,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:46:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 21:46:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:46:59,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:59,549 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,752 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-10-14 21:46:59,753 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096278094] [2019-10-14 21:46:59,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:59,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096278094] [2019-10-14 21:46:59,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466805948] [2019-10-14 21:46:59,900 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,946 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:59,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:59,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:46:59,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:47:00,030 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:00,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2019-10-14 21:47:00,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708299470] [2019-10-14 21:47:00,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:00,031 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:00,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:00,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:00,032 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2019-10-14 21:47:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:00,180 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2019-10-14 21:47:00,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:00,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2019-10-14 21:47:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:00,182 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:47:00,182 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:47:00,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:47:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2019-10-14 21:47:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:47:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-14 21:47:00,190 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2019-10-14 21:47:00,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:00,191 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-14 21:47:00,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-14 21:47:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:47:00,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:00,192 INFO L380 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:00,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,397 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:00,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:00,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1963168809, now seen corresponding path program 5 times [2019-10-14 21:47:00,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:00,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36380317] [2019-10-14 21:47:00,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:00,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36380317] [2019-10-14 21:47:00,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443396716] [2019-10-14 21:47:00,547 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,669 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:47:00,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:00,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:47:00,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:00,697 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:00,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:47:00,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542822046] [2019-10-14 21:47:00,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:00,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:00,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:00,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:00,699 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 10 states. [2019-10-14 21:47:00,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:00,864 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-14 21:47:00,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:00,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-10-14 21:47:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:00,867 INFO L225 Difference]: With dead ends: 63 [2019-10-14 21:47:00,867 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:47:00,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:47:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2019-10-14 21:47:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:47:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 21:47:00,875 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2019-10-14 21:47:00,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:00,875 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 21:47:00,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 21:47:00,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:47:00,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:00,876 INFO L380 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:01,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,081 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:01,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1389169850, now seen corresponding path program 6 times [2019-10-14 21:47:01,082 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:01,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463681123] [2019-10-14 21:47:01,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:01,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463681123] [2019-10-14 21:47:01,194 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148591338] [2019-10-14 21:47:01,194 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,363 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-14 21:47:01,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:01,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:01,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:01,379 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:01,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:47:01,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577149438] [2019-10-14 21:47:01,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:01,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:01,381 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2019-10-14 21:47:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:01,514 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-10-14 21:47:01,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:47:01,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2019-10-14 21:47:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:01,516 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:47:01,517 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:47:01,517 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:47:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-10-14 21:47:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:47:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-14 21:47:01,524 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-10-14 21:47:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:01,524 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-14 21:47:01,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-14 21:47:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:47:01,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:01,525 INFO L380 BasicCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:01,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,730 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2062514121, now seen corresponding path program 7 times [2019-10-14 21:47:01,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:01,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169348621] [2019-10-14 21:47:01,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:01,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169348621] [2019-10-14 21:47:01,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152732102] [2019-10-14 21:47:01,874 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:47:01,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:47:02,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:02,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2019-10-14 21:47:02,046 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518416087] [2019-10-14 21:47:02,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:47:02,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:02,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:47:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:02,048 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 20 states. [2019-10-14 21:47:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:02,288 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2019-10-14 21:47:02,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:47:02,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2019-10-14 21:47:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:02,289 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:47:02,289 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:47:02,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:47:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2019-10-14 21:47:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:47:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-14 21:47:02,297 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2019-10-14 21:47:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:02,298 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-14 21:47:02,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:47:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-14 21:47:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:47:02,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:02,299 INFO L380 BasicCegarLoop]: trace histogram [16, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:02,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:02,504 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:02,504 INFO L82 PathProgramCache]: Analyzing trace with hash -35040986, now seen corresponding path program 8 times [2019-10-14 21:47:02,505 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:02,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145326434] [2019-10-14 21:47:02,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:02,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:02,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:02,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145326434] [2019-10-14 21:47:02,625 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588610692] [2019-10-14 21:47:02,625 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:02,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:02,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:02,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:47:02,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:47:02,824 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:02,824 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 26 [2019-10-14 21:47:02,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377849527] [2019-10-14 21:47:02,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:47:02,825 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:47:02,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:47:02,826 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 26 states. [2019-10-14 21:47:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:03,071 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2019-10-14 21:47:03,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:47:03,071 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 39 [2019-10-14 21:47:03,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:03,073 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:47:03,073 INFO L226 Difference]: Without dead ends: 77 [2019-10-14 21:47:03,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:47:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-14 21:47:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2019-10-14 21:47:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:47:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-10-14 21:47:03,082 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2019-10-14 21:47:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:03,082 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-10-14 21:47:03,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:47:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-10-14 21:47:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:47:03,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:03,083 INFO L380 BasicCegarLoop]: trace histogram [22, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:03,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:03,284 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:03,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1170528361, now seen corresponding path program 9 times [2019-10-14 21:47:03,286 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:03,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823167362] [2019-10-14 21:47:03,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 21:47:03,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823167362] [2019-10-14 21:47:03,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10228529] [2019-10-14 21:47:03,422 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:04,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:47:04,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:04,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:04,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 21:47:04,691 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:04,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:47:04,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523998431] [2019-10-14 21:47:04,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:04,692 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:04,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:04,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:04,693 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 14 states. [2019-10-14 21:47:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:04,874 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2019-10-14 21:47:04,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:04,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2019-10-14 21:47:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:04,875 INFO L225 Difference]: With dead ends: 91 [2019-10-14 21:47:04,876 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:47:04,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:47:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2019-10-14 21:47:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:47:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-14 21:47:04,884 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2019-10-14 21:47:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:04,885 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-14 21:47:04,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-14 21:47:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:47:04,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:04,886 INFO L380 BasicCegarLoop]: trace histogram [22, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:05,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:05,092 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash -191219962, now seen corresponding path program 10 times [2019-10-14 21:47:05,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:05,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804297016] [2019-10-14 21:47:05,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:05,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:05,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 21:47:05,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804297016] [2019-10-14 21:47:05,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794892548] [2019-10-14 21:47:05,226 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:05,294 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:05,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:05,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:47:05,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:05,477 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:05,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 32 [2019-10-14 21:47:05,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937357302] [2019-10-14 21:47:05,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:47:05,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:05,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:47:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:47:05,480 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 32 states. [2019-10-14 21:47:05,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:05,835 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2019-10-14 21:47:05,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:47:05,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 47 [2019-10-14 21:47:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:05,837 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:47:05,837 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 21:47:05,838 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:47:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 21:47:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2019-10-14 21:47:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:47:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-10-14 21:47:05,846 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2019-10-14 21:47:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:05,847 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-10-14 21:47:05,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:47:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-10-14 21:47:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:47:05,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:05,848 INFO L380 BasicCegarLoop]: trace histogram [28, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:06,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:06,056 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:06,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:06,057 INFO L82 PathProgramCache]: Analyzing trace with hash 273034889, now seen corresponding path program 11 times [2019-10-14 21:47:06,057 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:06,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689194285] [2019-10-14 21:47:06,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:06,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:06,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:06,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-10-14 21:47:06,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689194285] [2019-10-14 21:47:06,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252703254] [2019-10-14 21:47:06,218 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:40,113 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-14 21:47:40,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:40,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:47:40,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:47:40,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:40,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 31] total 38 [2019-10-14 21:47:40,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758951916] [2019-10-14 21:47:40,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:47:40,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:47:40,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=667, Invalid=739, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:47:40,353 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 38 states. [2019-10-14 21:47:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:40,718 INFO L93 Difference]: Finished difference Result 124 states and 146 transitions. [2019-10-14 21:47:40,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 21:47:40,719 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 54 [2019-10-14 21:47:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:40,720 INFO L225 Difference]: With dead ends: 124 [2019-10-14 21:47:40,721 INFO L226 Difference]: Without dead ends: 101 [2019-10-14 21:47:40,721 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=667, Invalid=739, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:47:40,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-14 21:47:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2019-10-14 21:47:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:47:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-10-14 21:47:40,731 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 54 [2019-10-14 21:47:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:40,731 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-10-14 21:47:40,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:47:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-10-14 21:47:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:47:40,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:40,733 INFO L380 BasicCegarLoop]: trace histogram [34, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:40,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:40,946 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:40,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1244549734, now seen corresponding path program 12 times [2019-10-14 21:47:40,947 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:40,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348811517] [2019-10-14 21:47:40,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:40,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:40,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2019-10-14 21:47:41,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348811517] [2019-10-14 21:47:41,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409063512] [2019-10-14 21:47:41,115 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true