/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:36:52,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:36:52,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:36:52,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:36:52,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:36:52,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:36:52,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:36:52,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:36:52,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:36:52,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:36:52,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:36:52,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:36:52,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:36:52,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:36:52,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:36:52,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:36:52,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:36:52,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:36:52,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:36:52,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:36:52,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:36:52,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:36:52,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:36:52,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:36:52,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:36:52,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:36:52,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:36:52,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:36:52,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:36:52,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:36:52,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:36:52,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:36:52,212 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:36:52,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:36:52,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:36:52,214 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:36:52,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:36:52,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:36:52,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:36:52,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:36:52,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:36:52,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:36:52,232 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:36:52,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:36:52,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:36:52,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:36:52,234 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:36:52,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:36:52,235 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:36:52,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:36:52,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:36:52,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:36:52,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:36:52,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:36:52,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:36:52,236 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:36:52,236 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:36:52,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:36:52,237 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:36:52,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:36:52,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:36:52,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:36:52,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:36:52,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:36:52,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:36:52,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:36:52,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:36:52,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:36:52,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:36:52,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:36:52,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:36:52,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:36:52,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:36:52,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:36:52,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:36:52,535 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:36:52,535 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:36:52,537 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_08.i [2019-11-23 20:36:52,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb624a75/f3529e4bb04c4840b3f2684d4f57a022/FLAGfa1458af5 [2019-11-23 20:36:53,034 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:36:53,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_08.i [2019-11-23 20:36:53,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb624a75/f3529e4bb04c4840b3f2684d4f57a022/FLAGfa1458af5 [2019-11-23 20:36:53,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb624a75/f3529e4bb04c4840b3f2684d4f57a022 [2019-11-23 20:36:53,415 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:36:53,417 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:36:53,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:36:53,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:36:53,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:36:53,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee337c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53, skipping insertion in model container [2019-11-23 20:36:53,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:36:53,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:36:53,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:36:53,634 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:36:53,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:36:53,673 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:36:53,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53 WrapperNode [2019-11-23 20:36:53,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:36:53,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:36:53,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:36:53,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:36:53,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:36:53,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:36:53,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:36:53,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:36:53,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... [2019-11-23 20:36:53,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:36:53,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:36:53,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:36:53,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:36:53,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:36:53,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:36:53,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:36:53,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:36:53,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:36:53,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:36:53,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:36:54,090 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:36:54,091 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:36:54,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:54 BoogieIcfgContainer [2019-11-23 20:36:54,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:36:54,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:36:54,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:36:54,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:36:54,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:53" (1/3) ... [2019-11-23 20:36:54,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ecf456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:54, skipping insertion in model container [2019-11-23 20:36:54,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:53" (2/3) ... [2019-11-23 20:36:54,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ecf456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:54, skipping insertion in model container [2019-11-23 20:36:54,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:54" (3/3) ... [2019-11-23 20:36:54,122 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_08.i [2019-11-23 20:36:54,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:36:54,161 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:36:54,177 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:36:54,204 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:36:54,204 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:36:54,204 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:36:54,204 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:36:54,205 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:36:54,205 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:36:54,205 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:36:54,205 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:36:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:36:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:36:54,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:54,225 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:54,226 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2019-11-23 20:36:54,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:54,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300871576] [2019-11-23 20:36:54,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:36:54,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300871576] [2019-11-23 20:36:54,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:36:54,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:36:54,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018354903] [2019-11-23 20:36:54,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:36:54,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:54,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:36:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:36:54,426 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 20:36:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:54,518 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-11-23 20:36:54,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:36:54,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:36:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:54,534 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:36:54,534 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:36:54,539 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:36:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:36:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:36:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:36:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 20:36:54,572 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-11-23 20:36:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:54,572 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 20:36:54,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:36:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 20:36:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:36:54,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:54,574 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:54,574 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2019-11-23 20:36:54,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:54,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631422139] [2019-11-23 20:36:54,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:36:54,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631422139] [2019-11-23 20:36:54,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:36:54,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:36:54,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019096105] [2019-11-23 20:36:54,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:36:54,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:54,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:36:54,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:36:54,620 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-23 20:36:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:54,671 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-23 20:36:54,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:36:54,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:36:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:54,673 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:36:54,673 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:36:54,674 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:36:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:36:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-23 20:36:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:36:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:36:54,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2019-11-23 20:36:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:54,678 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:36:54,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:36:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:36:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:36:54,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:54,679 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:54,680 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:54,680 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2019-11-23 20:36:54,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:54,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502879198] [2019-11-23 20:36:54,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:36:54,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502879198] [2019-11-23 20:36:54,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034582051] [2019-11-23 20:36:54,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:54,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:36:54,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:36:54,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:54,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:36:54,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193270708] [2019-11-23 20:36:54,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:36:54,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:54,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:36:54,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:36:54,890 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 6 states. [2019-11-23 20:36:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:54,972 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-23 20:36:54,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:36:54,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 20:36:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:54,974 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:36:54,974 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:36:54,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:36:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:36:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2019-11-23 20:36:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:36:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:36:54,980 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:36:54,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:54,980 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:36:54,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:36:54,981 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:36:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:36:54,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:54,982 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:55,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:55,188 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash -588918413, now seen corresponding path program 2 times [2019-11-23 20:36:55,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:55,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781390439] [2019-11-23 20:36:55,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:36:55,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781390439] [2019-11-23 20:36:55,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923814299] [2019-11-23 20:36:55,273 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:55,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:55,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:55,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:36:55,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:36:55,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:55,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 20:36:55,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087009874] [2019-11-23 20:36:55,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:36:55,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:55,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:36:55,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:36:55,397 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2019-11-23 20:36:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:55,471 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-23 20:36:55,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:36:55,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 20:36:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:55,473 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:36:55,473 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:36:55,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:36:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:36:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-11-23 20:36:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:36:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:36:55,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2019-11-23 20:36:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:55,481 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:36:55,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:36:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:36:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:36:55,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:55,482 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:55,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:55,686 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:55,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:55,687 INFO L82 PathProgramCache]: Analyzing trace with hash -825242030, now seen corresponding path program 3 times [2019-11-23 20:36:55,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:55,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173578238] [2019-11-23 20:36:55,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:36:55,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173578238] [2019-11-23 20:36:55,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055776765] [2019-11-23 20:36:55,845 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:55,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:36:55,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:55,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:36:55,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:36:55,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:55,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:36:55,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387853457] [2019-11-23 20:36:55,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:36:55,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:55,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:36:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:36:55,921 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-11-23 20:36:55,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:55,983 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-11-23 20:36:55,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:36:55,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:36:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:55,984 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:36:55,985 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:36:55,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:36:55,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:36:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 21. [2019-11-23 20:36:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:36:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:36:55,991 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-11-23 20:36:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:55,991 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:36:55,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:36:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:36:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:36:55,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:55,992 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:56,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:56,197 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash 238747000, now seen corresponding path program 4 times [2019-11-23 20:36:56,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:56,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95103415] [2019-11-23 20:36:56,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:36:56,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95103415] [2019-11-23 20:36:56,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473737194] [2019-11-23 20:36:56,336 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:56,384 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:56,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:56,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:36:56,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:36:56,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:56,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-11-23 20:36:56,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715642306] [2019-11-23 20:36:56,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:36:56,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:56,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:36:56,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:36:56,472 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 14 states. [2019-11-23 20:36:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:56,587 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2019-11-23 20:36:56,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:36:56,588 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-11-23 20:36:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:56,589 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:36:56,589 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:36:56,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:36:56,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:36:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 27. [2019-11-23 20:36:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:36:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-23 20:36:56,596 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2019-11-23 20:36:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:56,596 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-23 20:36:56,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:36:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-23 20:36:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:36:56,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:56,597 INFO L410 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:56,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:56,798 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:56,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:56,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1524497271, now seen corresponding path program 5 times [2019-11-23 20:36:56,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:56,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863024003] [2019-11-23 20:36:56,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:36:56,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863024003] [2019-11-23 20:36:56,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843717780] [2019-11-23 20:36:56,961 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:57,350 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:36:57,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:57,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:36:57,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:36:57,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:57,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:36:57,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357797596] [2019-11-23 20:36:57,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:36:57,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:57,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:36:57,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:36:57,401 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2019-11-23 20:36:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:57,484 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2019-11-23 20:36:57,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:36:57,485 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-11-23 20:36:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:57,486 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:36:57,486 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:36:57,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:36:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:36:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 28. [2019-11-23 20:36:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:36:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 20:36:57,493 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2019-11-23 20:36:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:57,494 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 20:36:57,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:36:57,494 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 20:36:57,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:36:57,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:57,495 INFO L410 BasicCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:57,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:57,708 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash 66221299, now seen corresponding path program 6 times [2019-11-23 20:36:57,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:57,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806002640] [2019-11-23 20:36:57,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:36:57,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806002640] [2019-11-23 20:36:57,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871833194] [2019-11-23 20:36:57,816 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:58,112 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:36:58,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:58,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:36:58,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:36:58,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:58,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:36:58,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426012966] [2019-11-23 20:36:58,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:36:58,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:58,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:36:58,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:36:58,136 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2019-11-23 20:36:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:58,234 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2019-11-23 20:36:58,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:36:58,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-11-23 20:36:58,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:58,238 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:36:58,238 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:36:58,239 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:36:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:36:58,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 29. [2019-11-23 20:36:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:36:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-23 20:36:58,247 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2019-11-23 20:36:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:58,247 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-23 20:36:58,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:36:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-23 20:36:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:36:58,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:58,249 INFO L410 BasicCegarLoop]: trace histogram [11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:58,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:58,450 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2104306423, now seen corresponding path program 7 times [2019-11-23 20:36:58,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:58,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261825427] [2019-11-23 20:36:58,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:36:58,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261825427] [2019-11-23 20:36:58,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473563719] [2019-11-23 20:36:58,548 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:58,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:36:58,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:36:58,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:58,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2019-11-23 20:36:58,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683849252] [2019-11-23 20:36:58,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:36:58,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:58,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:36:58,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:36:58,743 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 21 states. [2019-11-23 20:36:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:58,894 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2019-11-23 20:36:58,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:36:58,894 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2019-11-23 20:36:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:58,895 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:36:58,896 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:36:58,896 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:36:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:36:58,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 37. [2019-11-23 20:36:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:36:58,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-23 20:36:58,909 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2019-11-23 20:36:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:58,910 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-23 20:36:58,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:36:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-23 20:36:58,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:36:58,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:58,911 INFO L410 BasicCegarLoop]: trace histogram [18, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:59,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:59,123 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:59,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:59,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1266653240, now seen corresponding path program 8 times [2019-11-23 20:36:59,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:59,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424789895] [2019-11-23 20:36:59,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:36:59,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424789895] [2019-11-23 20:36:59,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414396703] [2019-11-23 20:36:59,259 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:59,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:59,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:59,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:36:59,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:36:59,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:59,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21] total 28 [2019-11-23 20:36:59,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110391787] [2019-11-23 20:36:59,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:36:59,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:59,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:36:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:36:59,496 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 28 states. [2019-11-23 20:36:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:59,666 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2019-11-23 20:36:59,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:36:59,667 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-11-23 20:36:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:59,668 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:36:59,668 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 20:36:59,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:36:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 20:36:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2019-11-23 20:36:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:36:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-23 20:36:59,676 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 35 [2019-11-23 20:36:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:59,677 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-23 20:36:59,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:36:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-23 20:36:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:36:59,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:59,678 INFO L410 BasicCegarLoop]: trace histogram [25, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:59,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:59,882 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:59,883 INFO L82 PathProgramCache]: Analyzing trace with hash -186499561, now seen corresponding path program 9 times [2019-11-23 20:36:59,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:59,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761021279] [2019-11-23 20:36:59,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 20:37:00,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761021279] [2019-11-23 20:37:00,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284573941] [2019-11-23 20:37:00,010 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:00,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:37:00,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:00,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:37:00,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 20:37:00,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:00,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:37:00,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910334234] [2019-11-23 20:37:00,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:37:00,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:37:00,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:00,795 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 13 states. [2019-11-23 20:37:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:00,894 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2019-11-23 20:37:00,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:37:00,896 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2019-11-23 20:37:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:00,897 INFO L225 Difference]: With dead ends: 102 [2019-11-23 20:37:00,897 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:37:00,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:37:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 46. [2019-11-23 20:37:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:37:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-23 20:37:00,905 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2019-11-23 20:37:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:00,906 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-23 20:37:00,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:37:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-23 20:37:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:37:00,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:00,907 INFO L410 BasicCegarLoop]: trace histogram [25, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:01,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:01,117 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1435072941, now seen corresponding path program 10 times [2019-11-23 20:37:01,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:01,118 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387499229] [2019-11-23 20:37:01,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-11-23 20:37:01,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387499229] [2019-11-23 20:37:01,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687362688] [2019-11-23 20:37:01,271 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:01,359 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:01,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:01,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:37:01,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:37:01,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:01,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 28] total 36 [2019-11-23 20:37:01,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388199357] [2019-11-23 20:37:01,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:37:01,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:01,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:37:01,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=631, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:37:01,625 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 36 states. [2019-11-23 20:37:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:01,852 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2019-11-23 20:37:01,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:37:01,853 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2019-11-23 20:37:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:01,854 INFO L225 Difference]: With dead ends: 128 [2019-11-23 20:37:01,855 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:37:01,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=629, Invalid=631, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:37:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:37:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 55. [2019-11-23 20:37:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:37:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-11-23 20:37:01,870 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 44 [2019-11-23 20:37:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:01,870 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-11-23 20:37:01,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:37:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-11-23 20:37:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:37:01,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:01,871 INFO L410 BasicCegarLoop]: trace histogram [33, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:02,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:02,075 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:02,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1489095913, now seen corresponding path program 11 times [2019-11-23 20:37:02,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:02,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516810856] [2019-11-23 20:37:02,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-11-23 20:37:02,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516810856] [2019-11-23 20:37:02,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678461456] [2019-11-23 20:37:02,231 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:52,662 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:37:52,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:52,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:37:52,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:37:53,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:53,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 36] total 44 [2019-11-23 20:37:53,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279062564] [2019-11-23 20:37:53,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:37:53,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:37:53,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=945, Invalid=947, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:37:53,032 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 44 states. [2019-11-23 20:37:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:53,252 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2019-11-23 20:37:53,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:37:53,252 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 53 [2019-11-23 20:37:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:53,254 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:37:53,254 INFO L226 Difference]: Without dead ends: 124 [2019-11-23 20:37:53,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=945, Invalid=947, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:37:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-23 20:37:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 64. [2019-11-23 20:37:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:37:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-11-23 20:37:53,264 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 53 [2019-11-23 20:37:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:53,264 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-11-23 20:37:53,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:37:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-11-23 20:37:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:37:53,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:53,265 INFO L410 BasicCegarLoop]: trace histogram [41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:53,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:53,481 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash 309949395, now seen corresponding path program 12 times [2019-11-23 20:37:53,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:53,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661996038] [2019-11-23 20:37:53,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2019-11-23 20:37:53,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661996038] [2019-11-23 20:37:53,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799535730] [2019-11-23 20:37:53,662 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:13,854 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:38:13,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:13,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:38:13,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2019-11-23 20:38:13,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:13,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:38:13,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481007440] [2019-11-23 20:38:13,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:38:13,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:13,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:38:13,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:38:13,890 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 16 states. [2019-11-23 20:38:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:14,008 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2019-11-23 20:38:14,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:38:14,009 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-11-23 20:38:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:14,011 INFO L225 Difference]: With dead ends: 136 [2019-11-23 20:38:14,011 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 20:38:14,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:38:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 20:38:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 65. [2019-11-23 20:38:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:38:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-11-23 20:38:14,024 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2019-11-23 20:38:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:14,025 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-11-23 20:38:14,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:38:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-11-23 20:38:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:38:14,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:14,027 INFO L410 BasicCegarLoop]: trace histogram [41, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:14,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:14,239 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:14,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1069942807, now seen corresponding path program 13 times [2019-11-23 20:38:14,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:14,240 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303147577] [2019-11-23 20:38:14,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2019-11-23 20:38:14,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303147577] [2019-11-23 20:38:14,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712699570] [2019-11-23 20:38:14,439 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:14,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:38:14,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:38:14,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:14,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 44] total 53 [2019-11-23 20:38:14,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027034620] [2019-11-23 20:38:14,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 20:38:14,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:14,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 20:38:14,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=1379, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:38:14,951 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 53 states. [2019-11-23 20:38:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:15,275 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2019-11-23 20:38:15,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 20:38:15,276 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 63 [2019-11-23 20:38:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:15,288 INFO L225 Difference]: With dead ends: 166 [2019-11-23 20:38:15,288 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 20:38:15,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1377, Invalid=1379, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:38:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 20:38:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2019-11-23 20:38:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:38:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2019-11-23 20:38:15,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 63 [2019-11-23 20:38:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:15,297 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2019-11-23 20:38:15,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 20:38:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2019-11-23 20:38:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 20:38:15,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:15,298 INFO L410 BasicCegarLoop]: trace histogram [50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:15,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:15,508 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:15,508 INFO L82 PathProgramCache]: Analyzing trace with hash 803137528, now seen corresponding path program 14 times [2019-11-23 20:38:15,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:15,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147640602] [2019-11-23 20:38:15,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2019-11-23 20:38:15,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147640602] [2019-11-23 20:38:15,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751711442] [2019-11-23 20:38:15,717 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:15,802 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:15,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:15,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-23 20:38:15,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:38:16,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:16,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 53] total 62 [2019-11-23 20:38:16,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425062814] [2019-11-23 20:38:16,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-11-23 20:38:16,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:16,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-11-23 20:38:16,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:38:16,268 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 62 states. [2019-11-23 20:38:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:16,569 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2019-11-23 20:38:16,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-11-23 20:38:16,569 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 73 [2019-11-23 20:38:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:16,570 INFO L225 Difference]: With dead ends: 182 [2019-11-23 20:38:16,570 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:38:16,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:38:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:38:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 85. [2019-11-23 20:38:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 20:38:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2019-11-23 20:38:16,579 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 73 [2019-11-23 20:38:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:16,579 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2019-11-23 20:38:16,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-11-23 20:38:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2019-11-23 20:38:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:38:16,580 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:16,580 INFO L410 BasicCegarLoop]: trace histogram [59, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:16,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:16,784 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash 199195127, now seen corresponding path program 15 times [2019-11-23 20:38:16,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:16,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789974136] [2019-11-23 20:38:16,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-23 20:38:17,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789974136] [2019-11-23 20:38:17,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525724293] [2019-11-23 20:38:17,043 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:29,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:38:29,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:29,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:38:29,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-23 20:38:29,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:29,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:38:29,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696907922] [2019-11-23 20:38:29,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:38:29,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:38:29,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:38:29,175 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 19 states. [2019-11-23 20:38:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:29,300 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2019-11-23 20:38:29,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:38:29,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2019-11-23 20:38:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:29,302 INFO L225 Difference]: With dead ends: 172 [2019-11-23 20:38:29,302 INFO L226 Difference]: Without dead ends: 166 [2019-11-23 20:38:29,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:38:29,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-23 20:38:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 86. [2019-11-23 20:38:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:38:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-11-23 20:38:29,309 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2019-11-23 20:38:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:29,310 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-11-23 20:38:29,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:38:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-11-23 20:38:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:38:29,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:29,311 INFO L410 BasicCegarLoop]: trace histogram [59, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:29,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:29,521 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1931527795, now seen corresponding path program 16 times [2019-11-23 20:38:29,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:29,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142171108] [2019-11-23 20:38:29,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1906 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2019-11-23 20:38:29,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142171108] [2019-11-23 20:38:29,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129848639] [2019-11-23 20:38:29,818 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:29,928 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:29,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:29,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 61 conjunts are in the unsatisfiable core [2019-11-23 20:38:29,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1906 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:38:30,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:30,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 62] total 72 [2019-11-23 20:38:30,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511789580] [2019-11-23 20:38:30,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-11-23 20:38:30,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:30,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-11-23 20:38:30,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=2557, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:38:30,418 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 72 states. [2019-11-23 20:38:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:30,837 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2019-11-23 20:38:30,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-23 20:38:30,838 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 84 [2019-11-23 20:38:30,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:30,839 INFO L225 Difference]: With dead ends: 206 [2019-11-23 20:38:30,839 INFO L226 Difference]: Without dead ends: 182 [2019-11-23 20:38:30,842 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3699 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2555, Invalid=2557, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:38:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-23 20:38:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 97. [2019-11-23 20:38:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:38:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2019-11-23 20:38:30,847 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 84 [2019-11-23 20:38:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:30,848 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2019-11-23 20:38:30,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-11-23 20:38:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2019-11-23 20:38:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:38:30,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:30,849 INFO L410 BasicCegarLoop]: trace histogram [69, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:31,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:31,053 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1488614999, now seen corresponding path program 17 times [2019-11-23 20:38:31,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:31,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37881756] [2019-11-23 20:38:31,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2019-11-23 20:38:31,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37881756] [2019-11-23 20:38:31,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397500496] [2019-11-23 20:38:31,301 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true