/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_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:21:56,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:21:56,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:21:56,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:21:56,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:21:56,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:21:56,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:21:56,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:21:56,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:21:56,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:21:56,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:21:56,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:21:56,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:21:56,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:21:56,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:21:56,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:21:56,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:21:56,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:21:56,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:21:56,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:21:56,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:21:56,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:21:56,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:21:56,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:21:56,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:21:56,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:21:56,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:21:56,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:21:56,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:21:56,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:21:56,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:21:56,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:21:56,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:21:56,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:21:56,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:21:56,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:21:56,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:21:56,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:21:56,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:21:56,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:21:56,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:21:56,178 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 20:21:56,209 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:21:56,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:21:56,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:21:56,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:21:56,214 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:21:56,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:21:56,214 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:21:56,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:21:56,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:21:56,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:21:56,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:21:56,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:21:56,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:21:56,218 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:21:56,218 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:21:56,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:21:56,218 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:21:56,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:21:56,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:21:56,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:21:56,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:21:56,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:21:56,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:21:56,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:21:56,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:21:56,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:21:56,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:21:56,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:21:56,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:21:56,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:21:56,482 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:21:56,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:21:56,509 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:21:56,510 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:21:56,511 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:21:56,512 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-11-23 20:21:56,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76463f4fc/678eb89549d94904982abc6d2e9195bb/FLAG4ffe94934 [2019-11-23 20:21:57,080 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:21:57,080 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-11-23 20:21:57,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76463f4fc/678eb89549d94904982abc6d2e9195bb/FLAG4ffe94934 [2019-11-23 20:21:57,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76463f4fc/678eb89549d94904982abc6d2e9195bb [2019-11-23 20:21:57,425 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:21:57,427 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:21:57,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:21:57,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:21:57,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:21:57,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ecb9f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57, skipping insertion in model container [2019-11-23 20:21:57,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:21:57,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:21:57,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:21:57,608 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:21:57,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:21:57,647 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:21:57,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57 WrapperNode [2019-11-23 20:21:57,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:21:57,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:21:57,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:21:57,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:21:57,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:21:57,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:21:57,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:21:57,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:21:57,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (1/1) ... [2019-11-23 20:21:57,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:21:57,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:21:57,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:21:57,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:21:57,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (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 20:21:57,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:21:57,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:21:57,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:21:57,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:21:57,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:21:57,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:21:58,111 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:21:58,111 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:21:58,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:21:58 BoogieIcfgContainer [2019-11-23 20:21:58,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:21:58,115 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:21:58,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:21:58,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:21:58,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:21:57" (1/3) ... [2019-11-23 20:21:58,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6825ecf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:21:58, skipping insertion in model container [2019-11-23 20:21:58,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:21:57" (2/3) ... [2019-11-23 20:21:58,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6825ecf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:21:58, skipping insertion in model container [2019-11-23 20:21:58,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:21:58" (3/3) ... [2019-11-23 20:21:58,138 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2019-11-23 20:21:58,153 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:21:58,160 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:21:58,181 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:21:58,203 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:21:58,203 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:21:58,204 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:21:58,204 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:21:58,204 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:21:58,204 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:21:58,204 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:21:58,204 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:21:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-23 20:21:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:21:58,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:58,224 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:58,224 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2019-11-23 20:21:58,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:58,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411099694] [2019-11-23 20:21:58,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:58,381 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 20:21:58,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411099694] [2019-11-23 20:21:58,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:21:58,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:21:58,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352866192] [2019-11-23 20:21:58,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:21:58,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:21:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:21:58,399 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-23 20:21:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:58,439 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2019-11-23 20:21:58,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:21:58,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:21:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:58,449 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:21:58,449 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:21:58,452 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 20:21:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:21:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-11-23 20:21:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:21:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-23 20:21:58,483 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2019-11-23 20:21:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:58,483 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-23 20:21:58,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:21:58,483 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-23 20:21:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:21:58,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:58,484 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:58,485 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2019-11-23 20:21:58,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:58,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856128044] [2019-11-23 20:21:58,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:58,540 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 20:21:58,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856128044] [2019-11-23 20:21:58,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:21:58,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:21:58,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743941337] [2019-11-23 20:21:58,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:21:58,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:58,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:21:58,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:21:58,544 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2019-11-23 20:21:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:58,591 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2019-11-23 20:21:58,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:21:58,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-23 20:21:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:58,593 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:21:58,593 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:21:58,594 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 20:21:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:21:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-11-23 20:21:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:21:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-23 20:21:58,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-11-23 20:21:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:58,600 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-23 20:21:58,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:21:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-23 20:21:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:21:58,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:58,601 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:58,602 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:58,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:58,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2019-11-23 20:21:58,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:58,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829342687] [2019-11-23 20:21:58,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:21:58,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829342687] [2019-11-23 20:21:58,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692483601] [2019-11-23 20:21:58,703 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 20:21:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:58,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:21:58,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:21:58,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:58,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:21:58,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747152347] [2019-11-23 20:21:58,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:21:58,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:58,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:21:58,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:21:58,813 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2019-11-23 20:21:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:58,850 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-11-23 20:21:58,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:21:58,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-23 20:21:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:58,851 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:21:58,852 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:21:58,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 20:21:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:21:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 20:21:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:21:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-23 20:21:58,859 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2019-11-23 20:21:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:58,859 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-23 20:21:58,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:21:58,859 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-23 20:21:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:21:58,860 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:58,860 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:59,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:59,074 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash 34773395, now seen corresponding path program 2 times [2019-11-23 20:21:59,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:59,076 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704382798] [2019-11-23 20:21:59,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:21:59,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704382798] [2019-11-23 20:21:59,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858489272] [2019-11-23 20:21:59,176 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 20:21:59,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:59,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:59,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:21:59,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:21:59,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:59,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:21:59,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748643452] [2019-11-23 20:21:59,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:21:59,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:59,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:21:59,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:21:59,260 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-23 20:21:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:59,300 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-11-23 20:21:59,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:21:59,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 20:21:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:59,303 INFO L225 Difference]: With dead ends: 40 [2019-11-23 20:21:59,303 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:21:59,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 20:21:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:21:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:21:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:21:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-23 20:21:59,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2019-11-23 20:21:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:59,313 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-23 20:21:59,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:21:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-23 20:21:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:21:59,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:59,315 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:59,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:59,519 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash 647287121, now seen corresponding path program 3 times [2019-11-23 20:21:59,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:59,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331410738] [2019-11-23 20:21:59,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:21:59,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331410738] [2019-11-23 20:21:59,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357016721] [2019-11-23 20:21:59,611 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 20:21:59,667 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:21:59,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:59,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:21:59,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:21:59,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:59,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:21:59,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579342038] [2019-11-23 20:21:59,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:21:59,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:21:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:21:59,699 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 8 states. [2019-11-23 20:21:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:59,786 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2019-11-23 20:21:59,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:21:59,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-23 20:21:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:59,788 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:21:59,788 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:21:59,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:21:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:21:59,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-23 20:21:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:21:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-23 20:21:59,794 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2019-11-23 20:21:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:59,794 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-23 20:21:59,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:21:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-23 20:21:59,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:21:59,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:59,795 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:59,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:59,996 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1515345205, now seen corresponding path program 4 times [2019-11-23 20:21:59,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:59,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740719694] [2019-11-23 20:21:59,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:22:00,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740719694] [2019-11-23 20:22:00,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998288418] [2019-11-23 20:22:00,079 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 20:22:00,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:00,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:00,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:22:00,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:22:00,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:00,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:22:00,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623269747] [2019-11-23 20:22:00,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:22:00,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:00,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:22:00,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:22:00,149 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2019-11-23 20:22:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:00,189 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2019-11-23 20:22:00,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:22:00,189 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-11-23 20:22:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:00,190 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:22:00,190 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:22:00,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 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 20:22:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:22:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-11-23 20:22:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:22:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-11-23 20:22:00,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2019-11-23 20:22:00,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:00,196 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-11-23 20:22:00,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:22:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-11-23 20:22:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:22:00,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:00,198 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:00,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:00,402 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:00,402 INFO L82 PathProgramCache]: Analyzing trace with hash -422361975, now seen corresponding path program 5 times [2019-11-23 20:22:00,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:00,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033973112] [2019-11-23 20:22:00,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:22:00,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033973112] [2019-11-23 20:22:00,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923515866] [2019-11-23 20:22:00,549 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 20:22:00,940 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:22:00,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:00,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:22:00,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-23 20:22:00,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:00,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:22:00,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647109337] [2019-11-23 20:22:00,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:00,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:00,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:00,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:00,999 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 11 states. [2019-11-23 20:22:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:01,109 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2019-11-23 20:22:01,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:01,109 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2019-11-23 20:22:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:01,110 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:22:01,110 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:22:01,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:22:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-11-23 20:22:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:22:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-11-23 20:22:01,124 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2019-11-23 20:22:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:01,124 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-11-23 20:22:01,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-11-23 20:22:01,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:22:01,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:01,126 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:01,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:01,331 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2041222147, now seen corresponding path program 6 times [2019-11-23 20:22:01,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:01,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485720764] [2019-11-23 20:22:01,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:22:01,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485720764] [2019-11-23 20:22:01,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713700880] [2019-11-23 20:22:01,466 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 20:22:01,594 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:22:01,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:01,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:22:01,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:22:01,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:01,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:22:01,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133068020] [2019-11-23 20:22:01,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:22:01,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:22:01,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:01,658 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 13 states. [2019-11-23 20:22:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:01,776 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2019-11-23 20:22:01,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:22:01,776 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2019-11-23 20:22:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:01,777 INFO L225 Difference]: With dead ends: 70 [2019-11-23 20:22:01,777 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:22:01,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:22:01,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-23 20:22:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:22:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-23 20:22:01,784 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 35 [2019-11-23 20:22:01,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:01,784 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-23 20:22:01,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:22:01,785 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-23 20:22:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:22:01,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:01,786 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:01,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:01,991 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash -190930947, now seen corresponding path program 7 times [2019-11-23 20:22:01,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:01,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49397565] [2019-11-23 20:22:01,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:22:02,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49397565] [2019-11-23 20:22:02,112 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893806016] [2019-11-23 20:22:02,112 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 20:22:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:02,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:22:02,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:22:02,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:02,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:22:02,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668637206] [2019-11-23 20:22:02,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:02,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:02,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:02,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:02,207 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2019-11-23 20:22:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:02,254 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2019-11-23 20:22:02,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:22:02,256 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-11-23 20:22:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:02,257 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:22:02,257 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:22:02,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:22:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-23 20:22:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:22:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2019-11-23 20:22:02,269 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 41 [2019-11-23 20:22:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:02,270 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2019-11-23 20:22:02,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2019-11-23 20:22:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:22:02,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:02,271 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:02,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:02,477 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:02,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1537387205, now seen corresponding path program 8 times [2019-11-23 20:22:02,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:02,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710946273] [2019-11-23 20:22:02,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:22:02,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710946273] [2019-11-23 20:22:02,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309707596] [2019-11-23 20:22:02,627 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 20:22:02,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:02,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:02,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:02,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:22:02,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:02,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:22:02,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310461162] [2019-11-23 20:22:02,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:22:02,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:22:02,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:02,748 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 12 states. [2019-11-23 20:22:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:02,806 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2019-11-23 20:22:02,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:02,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2019-11-23 20:22:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:02,807 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:22:02,807 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:22:02,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 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 20:22:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:22:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-23 20:22:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:22:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-11-23 20:22:02,816 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 43 [2019-11-23 20:22:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:02,816 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-11-23 20:22:02,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:22:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-11-23 20:22:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:22:02,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:02,818 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:03,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:03,022 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:03,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:03,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1598272249, now seen corresponding path program 9 times [2019-11-23 20:22:03,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:03,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830775382] [2019-11-23 20:22:03,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:22:03,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830775382] [2019-11-23 20:22:03,192 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638041491] [2019-11-23 20:22:03,192 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 20:22:03,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:22:03,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:03,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:22:03,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-23 20:22:03,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:03,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:22:03,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896524606] [2019-11-23 20:22:03,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:22:03,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:22:03,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:22:03,373 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 17 states. [2019-11-23 20:22:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:03,511 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2019-11-23 20:22:03,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:22:03,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2019-11-23 20:22:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:03,512 INFO L225 Difference]: With dead ends: 84 [2019-11-23 20:22:03,513 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:22:03,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:22:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:22:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-23 20:22:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:22:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2019-11-23 20:22:03,519 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 45 [2019-11-23 20:22:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:03,520 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2019-11-23 20:22:03,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:22:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2019-11-23 20:22:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:22:03,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:03,521 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:03,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:03,725 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1964633715, now seen corresponding path program 10 times [2019-11-23 20:22:03,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:03,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134206518] [2019-11-23 20:22:03,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:22:03,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134206518] [2019-11-23 20:22:03,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832189816] [2019-11-23 20:22:03,850 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 20:22:03,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:03,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:03,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:22:03,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:22:03,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:03,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:22:03,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984202082] [2019-11-23 20:22:03,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:22:03,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:03,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:22:03,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:22:03,934 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 14 states. [2019-11-23 20:22:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:03,979 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2019-11-23 20:22:03,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:22:03,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-11-23 20:22:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:03,980 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:22:03,980 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:22:03,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:22:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:22:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-11-23 20:22:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:22:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2019-11-23 20:22:03,985 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 51 [2019-11-23 20:22:03,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:03,985 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2019-11-23 20:22:03,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:22:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2019-11-23 20:22:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:22:03,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:03,987 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:04,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:04,190 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:04,191 INFO L82 PathProgramCache]: Analyzing trace with hash -786584015, now seen corresponding path program 11 times [2019-11-23 20:22:04,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:04,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756853455] [2019-11-23 20:22:04,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:22:04,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756853455] [2019-11-23 20:22:04,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660922939] [2019-11-23 20:22:04,332 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 20:22:25,836 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:22:25,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:25,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:22:25,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:22:25,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:25,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2019-11-23 20:22:25,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691924955] [2019-11-23 20:22:25,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:22:25,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:22:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:22:25,962 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 20 states. [2019-11-23 20:22:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:26,109 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2019-11-23 20:22:26,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:22:26,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2019-11-23 20:22:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:26,111 INFO L225 Difference]: With dead ends: 96 [2019-11-23 20:22:26,111 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:22:26,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:22:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:22:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2019-11-23 20:22:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:22:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-11-23 20:22:26,119 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 53 [2019-11-23 20:22:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:26,119 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-11-23 20:22:26,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:22:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-11-23 20:22:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:22:26,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:26,120 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:26,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:26,321 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:26,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:26,322 INFO L82 PathProgramCache]: Analyzing trace with hash 607412139, now seen corresponding path program 12 times [2019-11-23 20:22:26,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:26,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697686897] [2019-11-23 20:22:26,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:22:26,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697686897] [2019-11-23 20:22:26,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717570114] [2019-11-23 20:22:26,489 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 20:22:32,402 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:22:32,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:32,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:22:32,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-11-23 20:22:32,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:32,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2019-11-23 20:22:32,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599637889] [2019-11-23 20:22:32,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:22:32,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:22:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:22:32,579 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 24 states. [2019-11-23 20:22:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:32,855 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:22:32,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:22:32,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2019-11-23 20:22:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:32,856 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:22:32,856 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:22:32,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:22:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:22:32,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:22:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:22:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2019-11-23 20:22:32,874 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 59 [2019-11-23 20:22:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:32,874 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2019-11-23 20:22:32,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:22:32,874 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2019-11-23 20:22:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:22:32,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:32,878 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:33,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:33,079 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:33,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:33,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1828673309, now seen corresponding path program 13 times [2019-11-23 20:22:33,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:33,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434799520] [2019-11-23 20:22:33,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:22:33,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434799520] [2019-11-23 20:22:33,249 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985069704] [2019-11-23 20:22:33,250 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 20:22:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:33,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:22:33,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:22:33,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:33,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:22:33,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035071420] [2019-11-23 20:22:33,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:22:33,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:33,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:22:33,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:22:33,350 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 18 states. [2019-11-23 20:22:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:33,410 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2019-11-23 20:22:33,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:22:33,410 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2019-11-23 20:22:33,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:33,411 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:22:33,411 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:22:33,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 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 20:22:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:22:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:22:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:22:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-11-23 20:22:33,421 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 67 [2019-11-23 20:22:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:33,421 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-11-23 20:22:33,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:22:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-11-23 20:22:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:22:33,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:33,422 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:33,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:33,623 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash 599338145, now seen corresponding path program 14 times [2019-11-23 20:22:33,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:33,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933727333] [2019-11-23 20:22:33,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:22:33,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933727333] [2019-11-23 20:22:33,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818166724] [2019-11-23 20:22:33,815 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 20:22:33,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:33,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:33,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:22:33,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:22:33,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:33,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:22:33,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804574119] [2019-11-23 20:22:33,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:22:33,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:33,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:22:33,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:33,960 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 19 states. [2019-11-23 20:22:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:34,034 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2019-11-23 20:22:34,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:22:34,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2019-11-23 20:22:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:34,036 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:22:34,036 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:22:34,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:22:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 20:22:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:22:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2019-11-23 20:22:34,051 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 69 [2019-11-23 20:22:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:34,053 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2019-11-23 20:22:34,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:22:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2019-11-23 20:22:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:22:34,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:34,054 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:34,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:34,255 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:34,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1751103711, now seen corresponding path program 15 times [2019-11-23 20:22:34,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:34,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465966007] [2019-11-23 20:22:34,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:22:34,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465966007] [2019-11-23 20:22:34,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505364251] [2019-11-23 20:22:34,460 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 20:22:36,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:22:36,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:36,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:22:36,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-11-23 20:22:36,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:36,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2019-11-23 20:22:36,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838188223] [2019-11-23 20:22:36,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:22:36,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:22:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:22:36,331 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 27 states. [2019-11-23 20:22:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:36,504 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-11-23 20:22:36,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:22:36,505 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2019-11-23 20:22:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:36,505 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:22:36,505 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:22:36,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:22:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:22:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-11-23 20:22:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:22:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-11-23 20:22:36,512 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 71 [2019-11-23 20:22:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:36,512 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-11-23 20:22:36,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:22:36,513 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-11-23 20:22:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:22:36,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:36,513 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:36,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:36,720 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1948430297, now seen corresponding path program 16 times [2019-11-23 20:22:36,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:36,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83824558] [2019-11-23 20:22:36,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:22:36,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83824558] [2019-11-23 20:22:36,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14531724] [2019-11-23 20:22:36,955 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 20:22:37,021 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:37,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:37,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:37,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2019-11-23 20:22:37,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:37,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-11-23 20:22:37,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510082174] [2019-11-23 20:22:37,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:22:37,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:37,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:22:37,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:22:37,184 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 29 states. [2019-11-23 20:22:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:37,404 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-23 20:22:37,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:22:37,404 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2019-11-23 20:22:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:37,405 INFO L225 Difference]: With dead ends: 132 [2019-11-23 20:22:37,405 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:22:37,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:22:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:22:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-23 20:22:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:22:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2019-11-23 20:22:37,410 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 77 [2019-11-23 20:22:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:37,410 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2019-11-23 20:22:37,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:22:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2019-11-23 20:22:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:22:37,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:37,411 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:37,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:37,616 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash 33473363, now seen corresponding path program 17 times [2019-11-23 20:22:37,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:37,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954642973] [2019-11-23 20:22:37,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:22:37,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954642973] [2019-11-23 20:22:37,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380865967] [2019-11-23 20:22:37,874 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