/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_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:20:29,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:20:29,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:20:29,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:20:29,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:20:29,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:20:29,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:20:29,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:20:29,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:20:29,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:20:29,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:20:29,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:20:29,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:20:29,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:20:29,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:20:29,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:20:29,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:20:29,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:20:29,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:20:29,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:20:29,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:20:29,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:20:29,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:20:29,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:20:29,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:20:29,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:20:29,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:20:29,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:20:29,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:20:29,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:20:29,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:20:29,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:20:29,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:20:29,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:20:29,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:20:29,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:20:29,462 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 20:20:29,477 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:20:29,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:20:29,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:20:29,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:20:29,481 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:20:29,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:20:29,482 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:20:29,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:20:29,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:20:29,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:20:29,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:20:29,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:20:29,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:20:29,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:20:29,484 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:20:29,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:20:29,485 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:20:29,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:20:29,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:20:29,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:20:29,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:20:29,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:20:29,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:29,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:20:29,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:20:29,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:20:29,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:20:29,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:20:29,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:20:29,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:20:29,767 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:20:29,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:20:29,783 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:20:29,785 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:20:29,785 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:20:29,786 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-11-23 20:20:29,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bff324c82/2a2584a081b44b48aac965d6cac03575/FLAG00a006cda [2019-11-23 20:20:30,321 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:20:30,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-11-23 20:20:30,328 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bff324c82/2a2584a081b44b48aac965d6cac03575/FLAG00a006cda [2019-11-23 20:20:30,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bff324c82/2a2584a081b44b48aac965d6cac03575 [2019-11-23 20:20:30,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:20:30,749 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:20:30,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:30,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:20:30,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:20:30,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:30" (1/1) ... [2019-11-23 20:20:30,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449a522b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:30, skipping insertion in model container [2019-11-23 20:20:30,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:30" (1/1) ... [2019-11-23 20:20:30,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:20:30,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:20:30,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:30,997 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:20:31,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:31,041 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:20:31,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31 WrapperNode [2019-11-23 20:20:31,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:31,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:31,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:20:31,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:20:31,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:31,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:20:31,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:20:31,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:20:31,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (1/1) ... [2019-11-23 20:20:31,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:20:31,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:20:31,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:20:31,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:20:31,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (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 20:20:31,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:20:31,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:20:31,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:20:31,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:20:31,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:20:31,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:20:31,509 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:20:31,509 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:20:31,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:31 BoogieIcfgContainer [2019-11-23 20:20:31,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:20:31,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:20:31,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:20:31,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:20:31,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:20:30" (1/3) ... [2019-11-23 20:20:31,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4e8eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:31, skipping insertion in model container [2019-11-23 20:20:31,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:31" (2/3) ... [2019-11-23 20:20:31,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4e8eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:31, skipping insertion in model container [2019-11-23 20:20:31,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:31" (3/3) ... [2019-11-23 20:20:31,533 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2019-11-23 20:20:31,545 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:20:31,552 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 20:20:31,572 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 20:20:31,598 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:20:31,598 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:20:31,598 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:20:31,598 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:20:31,599 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:20:31,599 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:20:31,599 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:20:31,599 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:20:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-23 20:20:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:20:31,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,619 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:31,619 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:31,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1547085679, now seen corresponding path program 1 times [2019-11-23 20:20:31,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:31,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746713345] [2019-11-23 20:20:31,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,751 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 20:20:31,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746713345] [2019-11-23 20:20:31,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:31,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:20:31,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036775229] [2019-11-23 20:20:31,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:20:31,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:20:31,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:31,773 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-23 20:20:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,789 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2019-11-23 20:20:31,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:20:31,790 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:20:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,798 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:20:31,798 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:20:31,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:20:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 20:20:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:20:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-23 20:20:31,839 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 9 [2019-11-23 20:20:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:31,840 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-23 20:20:31,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:20:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-23 20:20:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:20:31,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,841 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:31,842 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:31,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:31,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1862006340, now seen corresponding path program 1 times [2019-11-23 20:20:31,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:31,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55115940] [2019-11-23 20:20:31,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,898 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 20:20:31,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55115940] [2019-11-23 20:20:31,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:31,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:31,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388152763] [2019-11-23 20:20:31,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:31,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:31,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:31,905 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 3 states. [2019-11-23 20:20:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,943 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2019-11-23 20:20:31,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:31,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:20:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,945 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:20:31,945 INFO L226 Difference]: Without dead ends: 24 [2019-11-23 20:20:31,946 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 20:20:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-23 20:20:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-11-23 20:20:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:20:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-23 20:20:31,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2019-11-23 20:20:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:31,953 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-23 20:20:31,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-23 20:20:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:20:31,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,955 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:31,956 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:31,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1719088890, now seen corresponding path program 1 times [2019-11-23 20:20:31,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:31,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105366609] [2019-11-23 20:20:31,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,000 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 20:20:32,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105366609] [2019-11-23 20:20:32,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:32,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:32,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855167283] [2019-11-23 20:20:32,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:32,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:32,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:32,003 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2019-11-23 20:20:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:32,023 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-11-23 20:20:32,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:32,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:20:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:32,025 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:20:32,025 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:20:32,026 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 20:20:32,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:20:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-23 20:20:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:20:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-23 20:20:32,031 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2019-11-23 20:20:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,032 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-23 20:20:32,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-23 20:20:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:20:32,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,033 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,033 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1486599471, now seen corresponding path program 1 times [2019-11-23 20:20:32,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028042261] [2019-11-23 20:20:32,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:32,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028042261] [2019-11-23 20:20:32,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:32,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:32,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618791653] [2019-11-23 20:20:32,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:32,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:32,121 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 3 states. [2019-11-23 20:20:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:32,140 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-11-23 20:20:32,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:32,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 20:20:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:32,141 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:20:32,142 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:20:32,142 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 20:20:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:20:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2019-11-23 20:20:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:20:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 20:20:32,148 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 14 [2019-11-23 20:20:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,149 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 20:20:32,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 20:20:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:20:32,150 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,150 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,150 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash 677252845, now seen corresponding path program 1 times [2019-11-23 20:20:32,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281038447] [2019-11-23 20:20:32,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,219 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 20:20:32,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281038447] [2019-11-23 20:20:32,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294954809] [2019-11-23 20:20:32,222 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 20:20:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:32,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:32,326 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 20:20:32,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:32,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:20:32,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827582606] [2019-11-23 20:20:32,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:20:32,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:20:32,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:32,329 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 5 states. [2019-11-23 20:20:32,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:32,359 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2019-11-23 20:20:32,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:32,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:20:32,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:32,361 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:20:32,361 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:20:32,361 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:20:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 20:20:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:20:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-23 20:20:32,373 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 14 [2019-11-23 20:20:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,374 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-23 20:20:32,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:20:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-23 20:20:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:20:32,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,376 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,584 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash -156534673, now seen corresponding path program 2 times [2019-11-23 20:20:32,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702837823] [2019-11-23 20:20:32,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:32,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702837823] [2019-11-23 20:20:32,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552555962] [2019-11-23 20:20:32,689 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 20:20:32,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:32,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:32,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:32,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:32,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:32,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:20:32,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925231414] [2019-11-23 20:20:32,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:20:32,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:20:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:20:32,771 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 6 states. [2019-11-23 20:20:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:32,812 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2019-11-23 20:20:32,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:20:32,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-23 20:20:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:32,815 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:20:32,815 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:20:32,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:20:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:20:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 20:20:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:20:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-23 20:20:32,828 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 16 [2019-11-23 20:20:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,829 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-23 20:20:32,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:20:32,834 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-23 20:20:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:20:32,835 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,835 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:33,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:33,037 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:33,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1732544881, now seen corresponding path program 3 times [2019-11-23 20:20:33,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:33,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863884165] [2019-11-23 20:20:33,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:33,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863884165] [2019-11-23 20:20:33,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134669935] [2019-11-23 20:20:33,136 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 20:20:33,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:20:33,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:33,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:33,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:20:33,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:33,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:20:33,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362404477] [2019-11-23 20:20:33,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:20:33,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:20:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:33,230 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 8 states. [2019-11-23 20:20:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:33,329 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2019-11-23 20:20:33,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:20:33,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-23 20:20:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:33,330 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:20:33,330 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:20:33,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:20:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-11-23 20:20:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:20:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-23 20:20:33,337 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 18 [2019-11-23 20:20:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:33,337 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-23 20:20:33,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:20:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-23 20:20:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:20:33,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:33,339 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:33,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:33,543 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:33,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:33,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1967073964, now seen corresponding path program 4 times [2019-11-23 20:20:33,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:33,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267441963] [2019-11-23 20:20:33,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:20:33,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267441963] [2019-11-23 20:20:33,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17160464] [2019-11-23 20:20:33,627 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 20:20:33,671 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:33,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:33,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:33,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:20:33,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:33,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:20:33,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520201575] [2019-11-23 20:20:33,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:20:33,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:20:33,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:33,688 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 8 states. [2019-11-23 20:20:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:33,728 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2019-11-23 20:20:33,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:33,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 20:20:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:33,730 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:20:33,730 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:20:33,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:33,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:20:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 20:20:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:20:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-23 20:20:33,736 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2019-11-23 20:20:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:33,736 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-23 20:20:33,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:20:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-23 20:20:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:20:33,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:33,738 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:33,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:33,941 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:33,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1346044398, now seen corresponding path program 5 times [2019-11-23 20:20:33,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:33,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026296345] [2019-11-23 20:20:33,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:20:34,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026296345] [2019-11-23 20:20:34,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044798694] [2019-11-23 20:20:34,038 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 20:20:34,178 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:20:34,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:34,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:34,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:20:34,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:34,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:20:34,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221078297] [2019-11-23 20:20:34,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:20:34,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:20:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:34,232 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 11 states. [2019-11-23 20:20:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,360 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2019-11-23 20:20:34,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:34,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-23 20:20:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,362 INFO L225 Difference]: With dead ends: 84 [2019-11-23 20:20:34,362 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:20:34,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:20:34,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-11-23 20:20:34,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:20:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-11-23 20:20:34,378 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2019-11-23 20:20:34,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,379 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-11-23 20:20:34,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:20:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-11-23 20:20:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:20:34,380 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,380 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,582 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2113892055, now seen corresponding path program 6 times [2019-11-23 20:20:34,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849594714] [2019-11-23 20:20:34,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:20:34,716 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849594714] [2019-11-23 20:20:34,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432368157] [2019-11-23 20:20:34,717 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 20:20:34,848 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:20:34,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:34,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:34,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:20:34,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:34,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:20:34,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351102611] [2019-11-23 20:20:34,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:20:34,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:20:34,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:34,921 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 13 states. [2019-11-23 20:20:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:35,055 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2019-11-23 20:20:35,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:20:35,057 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2019-11-23 20:20:35,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:35,058 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:20:35,058 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:20:35,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:20:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2019-11-23 20:20:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:20:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2019-11-23 20:20:35,065 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 30 [2019-11-23 20:20:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:35,065 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2019-11-23 20:20:35,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:20:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2019-11-23 20:20:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:20:35,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:35,066 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:35,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,276 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:35,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1964392146, now seen corresponding path program 7 times [2019-11-23 20:20:35,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:35,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784674258] [2019-11-23 20:20:35,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:20:35,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784674258] [2019-11-23 20:20:35,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359710209] [2019-11-23 20:20:35,472 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 20:20:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:35,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:35,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:20:35,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:35,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:20:35,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224978426] [2019-11-23 20:20:35,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:20:35,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:35,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:20:35,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:35,555 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 11 states. [2019-11-23 20:20:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:35,627 INFO L93 Difference]: Finished difference Result 102 states and 126 transitions. [2019-11-23 20:20:35,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:20:35,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-11-23 20:20:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:35,629 INFO L225 Difference]: With dead ends: 102 [2019-11-23 20:20:35,629 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:20:35,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:20:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-23 20:20:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:20:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2019-11-23 20:20:35,646 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 35 [2019-11-23 20:20:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:35,650 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2019-11-23 20:20:35,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:20:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2019-11-23 20:20:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:20:35,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:35,652 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:35,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,859 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash -936330004, now seen corresponding path program 8 times [2019-11-23 20:20:35,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:35,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561590100] [2019-11-23 20:20:35,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:20:35,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561590100] [2019-11-23 20:20:35,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827704284] [2019-11-23 20:20:35,976 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 20:20:36,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:36,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:36,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:20:36,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:20:36,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:36,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:20:36,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357780632] [2019-11-23 20:20:36,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:20:36,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:36,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:20:36,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:36,061 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 12 states. [2019-11-23 20:20:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:36,107 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2019-11-23 20:20:36,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:36,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-11-23 20:20:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:36,109 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:20:36,109 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:20:36,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:20:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-23 20:20:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:20:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2019-11-23 20:20:36,115 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 37 [2019-11-23 20:20:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:36,115 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2019-11-23 20:20:36,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:20:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2019-11-23 20:20:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:20:36,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:36,117 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:36,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,330 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash -811089622, now seen corresponding path program 9 times [2019-11-23 20:20:36,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:36,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491449632] [2019-11-23 20:20:36,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:20:36,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491449632] [2019-11-23 20:20:36,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57529673] [2019-11-23 20:20:36,444 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 20:20:36,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:20:36,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:36,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:36,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:20:36,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:36,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:20:36,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867053203] [2019-11-23 20:20:36,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:20:36,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:20:36,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:36,591 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 17 states. [2019-11-23 20:20:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:36,781 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2019-11-23 20:20:36,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:20:36,782 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2019-11-23 20:20:36,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:36,783 INFO L225 Difference]: With dead ends: 116 [2019-11-23 20:20:36,784 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:20:36,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:20:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:20:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2019-11-23 20:20:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:20:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2019-11-23 20:20:36,791 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 39 [2019-11-23 20:20:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:36,791 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2019-11-23 20:20:36,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:20:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2019-11-23 20:20:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:20:36,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:36,792 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:36,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,996 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:36,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2014775615, now seen corresponding path program 10 times [2019-11-23 20:20:36,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:36,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831549056] [2019-11-23 20:20:36,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:20:37,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831549056] [2019-11-23 20:20:37,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254203019] [2019-11-23 20:20:37,129 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 20:20:37,197 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:37,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:37,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:20:37,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:20:37,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:37,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:20:37,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176619267] [2019-11-23 20:20:37,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:20:37,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:37,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:20:37,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:20:37,237 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 14 states. [2019-11-23 20:20:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:37,299 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2019-11-23 20:20:37,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:20:37,300 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-11-23 20:20:37,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:37,301 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:20:37,301 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:20:37,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:20:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:20:37,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:20:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:20:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2019-11-23 20:20:37,308 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 44 [2019-11-23 20:20:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:37,309 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2019-11-23 20:20:37,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:20:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2019-11-23 20:20:37,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:20:37,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:37,310 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:37,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,515 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:37,516 INFO L82 PathProgramCache]: Analyzing trace with hash 435970881, now seen corresponding path program 11 times [2019-11-23 20:20:37,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:37,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285463632] [2019-11-23 20:20:37,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:20:37,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285463632] [2019-11-23 20:20:37,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344611894] [2019-11-23 20:20:37,683 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 20:20:39,768 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:20:39,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:39,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:20:39,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:20:39,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:39,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:20:39,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789354786] [2019-11-23 20:20:39,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:20:39,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:39,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:20:39,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:20:39,789 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand 15 states. [2019-11-23 20:20:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:39,861 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-11-23 20:20:39,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:20:39,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2019-11-23 20:20:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:39,862 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:20:39,862 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:20:39,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:20:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:20:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 20:20:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:20:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2019-11-23 20:20:39,869 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 46 [2019-11-23 20:20:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:39,869 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2019-11-23 20:20:39,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:20:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2019-11-23 20:20:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:20:39,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:39,870 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:40,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:40,076 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash -671923005, now seen corresponding path program 12 times [2019-11-23 20:20:40,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:40,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137536558] [2019-11-23 20:20:40,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:20:40,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137536558] [2019-11-23 20:20:40,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794112365] [2019-11-23 20:20:40,242 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 20:20:42,095 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:20:42,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:42,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:20:42,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:20:42,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:42,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-23 20:20:42,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776458030] [2019-11-23 20:20:42,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:20:42,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:20:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:42,176 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 21 states. [2019-11-23 20:20:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,435 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2019-11-23 20:20:42,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:20:42,436 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2019-11-23 20:20:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,437 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:20:42,437 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:20:42,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:20:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:20:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2019-11-23 20:20:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:20:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2019-11-23 20:20:42,443 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 48 [2019-11-23 20:20:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,443 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2019-11-23 20:20:42,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:20:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2019-11-23 20:20:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:20:42,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,444 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:42,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:42,650 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash -676724670, now seen corresponding path program 13 times [2019-11-23 20:20:42,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:42,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231407387] [2019-11-23 20:20:42,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:42,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231407387] [2019-11-23 20:20:42,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970021021] [2019-11-23 20:20:42,804 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 20:20:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:42,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:20:42,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:42,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:42,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:20:42,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799623942] [2019-11-23 20:20:42,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:20:42,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:42,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:20:42,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:42,917 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 17 states. [2019-11-23 20:20:42,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,987 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2019-11-23 20:20:42,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:20:42,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2019-11-23 20:20:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,989 INFO L225 Difference]: With dead ends: 138 [2019-11-23 20:20:42,989 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:20:42,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:20:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-23 20:20:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:20:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2019-11-23 20:20:42,994 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 53 [2019-11-23 20:20:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,994 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2019-11-23 20:20:42,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:20:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2019-11-23 20:20:42,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:20:42,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,996 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:43,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,199 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:43,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1102891136, now seen corresponding path program 14 times [2019-11-23 20:20:43,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:43,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830050587] [2019-11-23 20:20:43,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:43,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830050587] [2019-11-23 20:20:43,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118388610] [2019-11-23 20:20:43,386 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 20:20:43,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:43,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:43,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:20:43,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:43,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:43,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:20:43,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845070497] [2019-11-23 20:20:43,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:20:43,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:20:43,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:43,480 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 18 states. [2019-11-23 20:20:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:43,544 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2019-11-23 20:20:43,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:20:43,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2019-11-23 20:20:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:43,546 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:20:43,546 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:20:43,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:43,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:20:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:20:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:20:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2019-11-23 20:20:43,551 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 55 [2019-11-23 20:20:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:43,551 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2019-11-23 20:20:43,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:20:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2019-11-23 20:20:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:20:43,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:43,552 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:43,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,756 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1916696894, now seen corresponding path program 15 times [2019-11-23 20:20:43,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:43,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647789946] [2019-11-23 20:20:43,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:20:43,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647789946] [2019-11-23 20:20:43,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960202841] [2019-11-23 20:20:43,950 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 20:20:44,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:20:44,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:44,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:20:44,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:20:44,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:44,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-11-23 20:20:44,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617275167] [2019-11-23 20:20:44,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:20:44,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:44,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:20:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:20:44,675 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 25 states. [2019-11-23 20:20:45,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:45,014 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2019-11-23 20:20:45,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:20:45,015 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2019-11-23 20:20:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:45,016 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:20:45,016 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:20:45,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=588, Invalid=1052, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:20:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:20:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2019-11-23 20:20:45,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:20:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2019-11-23 20:20:45,021 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 57 [2019-11-23 20:20:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:45,021 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2019-11-23 20:20:45,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:20:45,022 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2019-11-23 20:20:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:20:45,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:45,023 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:45,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:45,227 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1654361131, now seen corresponding path program 16 times [2019-11-23 20:20:45,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:45,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913470691] [2019-11-23 20:20:45,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:20:45,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913470691] [2019-11-23 20:20:45,442 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813387292] [2019-11-23 20:20:45,442 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 20:20:45,526 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:45,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:45,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:20:45,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:20:45,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:45,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:20:45,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180333408] [2019-11-23 20:20:45,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:20:45,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:20:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:45,549 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 20 states. [2019-11-23 20:20:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:45,608 INFO L93 Difference]: Finished difference Result 156 states and 192 transitions. [2019-11-23 20:20:45,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:20:45,609 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2019-11-23 20:20:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:45,609 INFO L225 Difference]: With dead ends: 156 [2019-11-23 20:20:45,610 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:20:45,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:20:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2019-11-23 20:20:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:20:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2019-11-23 20:20:45,614 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 62 [2019-11-23 20:20:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:45,614 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2019-11-23 20:20:45,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:20:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2019-11-23 20:20:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:20:45,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:45,615 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:45,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:45,819 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1225578067, now seen corresponding path program 17 times [2019-11-23 20:20:45,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:45,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909532115] [2019-11-23 20:20:45,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:20:46,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909532115] [2019-11-23 20:20:46,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997906903] [2019-11-23 20:20:46,007 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