/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:36:41,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:36:41,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:36:41,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:36:41,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:36:41,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:36:41,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:36:41,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:36:41,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:36:41,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:36:41,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:36:41,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:36:41,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:36:41,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:36:41,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:36:41,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:36:41,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:36:41,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:36:41,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:36:41,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:36:41,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:36:41,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:36:41,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:36:41,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:36:41,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:36:41,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:36:41,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:36:41,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:36:41,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:36:41,174 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:36:41,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:36:41,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:36:41,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:36:41,179 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:36:41,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:36:41,181 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:36:41,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:36:41,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:36:41,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:36:41,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:36:41,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:36:41,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:36:41,182 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:36:41,182 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:36:41,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:36:41,182 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:36:41,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:36:41,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:36:41,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:36:41,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:36:41,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:36:41,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:36:41,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:36:41,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:36:41,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:36:41,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:36:41,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:36:41,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:36:41,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:36:41,476 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:36:41,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:36:41,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:36:41,494 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:36:41,495 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:36:41,495 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-11-23 20:36:41,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291a10f34/38459633d45a419186835647f4a03923/FLAGcbd81bfae [2019-11-23 20:36:41,997 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:36:41,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-11-23 20:36:42,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291a10f34/38459633d45a419186835647f4a03923/FLAGcbd81bfae [2019-11-23 20:36:42,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291a10f34/38459633d45a419186835647f4a03923 [2019-11-23 20:36:42,439 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:36:42,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:36:42,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:36:42,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:36:42,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:36:42,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ceb8032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42, skipping insertion in model container [2019-11-23 20:36:42,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:36:42,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:36:42,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:36:42,675 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:36:42,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:36:42,724 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:36:42,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42 WrapperNode [2019-11-23 20:36:42,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:36:42,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:36:42,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:36:42,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:36:42,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:36:42,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:36:42,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:36:42,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:36:42,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... [2019-11-23 20:36:42,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:36:42,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:36:42,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:36:42,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:36:42,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:36:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:36:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:36:42,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:36:42,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:36:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:36:42,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:36:43,231 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:36:43,232 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:36:43,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:43 BoogieIcfgContainer [2019-11-23 20:36:43,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:36:43,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:36:43,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:36:43,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:36:43,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:42" (1/3) ... [2019-11-23 20:36:43,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6632e4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:43, skipping insertion in model container [2019-11-23 20:36:43,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:42" (2/3) ... [2019-11-23 20:36:43,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6632e4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:43, skipping insertion in model container [2019-11-23 20:36:43,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:43" (3/3) ... [2019-11-23 20:36:43,259 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2019-11-23 20:36:43,276 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:36:43,283 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:36:43,298 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:36:43,322 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:36:43,323 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:36:43,323 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:36:43,323 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:36:43,323 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:36:43,323 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:36:43,323 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:36:43,324 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:36:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:36:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:36:43,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:43,345 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:43,346 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:43,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2019-11-23 20:36:43,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:43,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573815980] [2019-11-23 20:36:43,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:36:43,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573815980] [2019-11-23 20:36:43,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:36:43,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:36:43,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116883395] [2019-11-23 20:36:43,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:36:43,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:43,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:36:43,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:36:43,523 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 20:36:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:43,588 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-11-23 20:36:43,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:36:43,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:36:43,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:43,603 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:36:43,603 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:36:43,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:36:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:36:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:36:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:36:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 20:36:43,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-11-23 20:36:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:43,648 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 20:36:43,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:36:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 20:36:43,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:36:43,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:43,649 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:43,650 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:43,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:43,650 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2019-11-23 20:36:43,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:43,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39283799] [2019-11-23 20:36:43,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:36:43,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39283799] [2019-11-23 20:36:43,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:36:43,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:36:43,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888262845] [2019-11-23 20:36:43,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:36:43,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:36:43,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:36:43,707 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-23 20:36:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:43,754 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-23 20:36:43,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:36:43,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:36:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:43,755 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:36:43,756 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:36:43,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:36:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:36:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-23 20:36:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:36:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:36:43,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2019-11-23 20:36:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:43,761 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:36:43,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:36:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:36:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:36:43,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:43,763 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:43,763 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:43,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:43,764 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2019-11-23 20:36:43,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:43,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746921309] [2019-11-23 20:36:43,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:36:43,838 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746921309] [2019-11-23 20:36:43,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665799331] [2019-11-23 20:36:43,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:43,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:36:43,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:36:43,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:43,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:36:43,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245749495] [2019-11-23 20:36:43,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:36:43,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:43,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:36:43,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:36:43,951 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 6 states. [2019-11-23 20:36:44,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:44,040 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-23 20:36:44,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:36:44,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 20:36:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:44,043 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:36:44,043 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:36:44,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:36:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:36:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2019-11-23 20:36:44,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:36:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:36:44,054 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:36:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:44,055 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:36:44,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:36:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:36:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:36:44,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:44,056 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:44,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:44,260 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:44,261 INFO L82 PathProgramCache]: Analyzing trace with hash -588918413, now seen corresponding path program 2 times [2019-11-23 20:36:44,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:44,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091381750] [2019-11-23 20:36:44,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:36:44,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091381750] [2019-11-23 20:36:44,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362375087] [2019-11-23 20:36:44,366 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:44,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:44,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:44,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:36:44,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:36:44,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:44,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 20:36:44,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496361889] [2019-11-23 20:36:44,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:36:44,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:36:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:36:44,464 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2019-11-23 20:36:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:44,547 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-23 20:36:44,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:36:44,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 20:36:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:44,548 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:36:44,549 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:36:44,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:36:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:36:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-11-23 20:36:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:36:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:36:44,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2019-11-23 20:36:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:44,556 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:36:44,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:36:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:36:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:36:44,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:44,557 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:44,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:44,769 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash -825242030, now seen corresponding path program 3 times [2019-11-23 20:36:44,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:44,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894785784] [2019-11-23 20:36:44,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:36:44,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894785784] [2019-11-23 20:36:44,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793180930] [2019-11-23 20:36:44,896 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:44,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:36:44,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:44,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:36:44,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:36:44,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:44,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:36:44,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838968910] [2019-11-23 20:36:44,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:36:44,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:44,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:36:44,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:36:44,965 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-11-23 20:36:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:45,031 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-11-23 20:36:45,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:36:45,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:36:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:45,032 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:36:45,033 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:36:45,033 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:36:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:36:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 21. [2019-11-23 20:36:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:36:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:36:45,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-11-23 20:36:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:45,039 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:36:45,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:36:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:36:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:36:45,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:45,041 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:45,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:45,245 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash 238747000, now seen corresponding path program 4 times [2019-11-23 20:36:45,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:45,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388152763] [2019-11-23 20:36:45,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:36:45,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388152763] [2019-11-23 20:36:45,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75459205] [2019-11-23 20:36:45,365 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:45,410 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:45,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:45,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:36:45,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:36:45,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:45,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-11-23 20:36:45,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252302854] [2019-11-23 20:36:45,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:36:45,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:36:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:36:45,499 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 14 states. [2019-11-23 20:36:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:45,608 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2019-11-23 20:36:45,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:36:45,609 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-11-23 20:36:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:45,610 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:36:45,610 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:36:45,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:36:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:36:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 27. [2019-11-23 20:36:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:36:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-23 20:36:45,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2019-11-23 20:36:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:45,618 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-23 20:36:45,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:36:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-23 20:36:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:36:45,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:45,619 INFO L410 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:45,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:45,823 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:45,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1524497271, now seen corresponding path program 5 times [2019-11-23 20:36:45,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:45,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329832857] [2019-11-23 20:36:45,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:36:45,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329832857] [2019-11-23 20:36:45,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967804572] [2019-11-23 20:36:45,985 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:46,636 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:36:46,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:46,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:36:46,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:36:46,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:46,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 19 [2019-11-23 20:36:46,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312006297] [2019-11-23 20:36:46,758 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:36:46,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:36:46,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:36:46,759 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 19 states. [2019-11-23 20:36:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:46,896 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2019-11-23 20:36:46,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:36:46,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-11-23 20:36:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:46,898 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:36:46,898 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:36:46,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:36:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:36:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 33. [2019-11-23 20:36:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:36:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-23 20:36:46,906 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2019-11-23 20:36:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:46,906 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-23 20:36:46,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:36:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-23 20:36:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:36:46,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:46,908 INFO L410 BasicCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:47,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:47,109 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:47,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:47,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1541792360, now seen corresponding path program 6 times [2019-11-23 20:36:47,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:47,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165913729] [2019-11-23 20:36:47,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:36:47,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165913729] [2019-11-23 20:36:47,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558470063] [2019-11-23 20:36:47,241 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:47,469 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:36:47,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:47,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:36:47,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:36:47,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:47,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:36:47,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883571045] [2019-11-23 20:36:47,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:36:47,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:47,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:36:47,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:36:47,494 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2019-11-23 20:36:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:47,589 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2019-11-23 20:36:47,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:36:47,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-11-23 20:36:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:47,590 INFO L225 Difference]: With dead ends: 75 [2019-11-23 20:36:47,591 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:36:47,591 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:36:47,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:36:47,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2019-11-23 20:36:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:36:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-23 20:36:47,597 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2019-11-23 20:36:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:47,598 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-23 20:36:47,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:36:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-23 20:36:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:36:47,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:47,599 INFO L410 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:47,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:47,803 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:47,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:47,804 INFO L82 PathProgramCache]: Analyzing trace with hash -499476750, now seen corresponding path program 7 times [2019-11-23 20:36:47,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:47,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565114184] [2019-11-23 20:36:47,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:36:47,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565114184] [2019-11-23 20:36:47,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190210124] [2019-11-23 20:36:47,920 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:47,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:36:47,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:36:48,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:48,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 25 [2019-11-23 20:36:48,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827582606] [2019-11-23 20:36:48,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:36:48,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:48,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:36:48,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:36:48,104 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 25 states. [2019-11-23 20:36:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:48,266 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2019-11-23 20:36:48,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:36:48,267 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-23 20:36:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:48,268 INFO L225 Difference]: With dead ends: 96 [2019-11-23 20:36:48,268 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:36:48,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:36:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:36:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 41. [2019-11-23 20:36:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:36:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-23 20:36:48,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2019-11-23 20:36:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:48,277 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-23 20:36:48,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:36:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-23 20:36:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:36:48,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:48,278 INFO L410 BasicCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:48,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:48,483 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:48,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1499410168, now seen corresponding path program 8 times [2019-11-23 20:36:48,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:48,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148451394] [2019-11-23 20:36:48,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-23 20:36:48,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148451394] [2019-11-23 20:36:48,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931310351] [2019-11-23 20:36:48,605 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:48,671 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:48,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:48,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:36:48,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:36:48,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:48,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 25] total 31 [2019-11-23 20:36:48,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650381496] [2019-11-23 20:36:48,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:36:48,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:36:48,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=466, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:36:48,863 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 31 states. [2019-11-23 20:36:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:49,034 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2019-11-23 20:36:49,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:36:49,035 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2019-11-23 20:36:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:49,036 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:36:49,036 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:36:49,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=464, Invalid=466, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:36:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:36:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 48. [2019-11-23 20:36:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:36:49,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:36:49,047 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2019-11-23 20:36:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:49,048 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:36:49,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:36:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:36:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:36:49,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:49,049 INFO L410 BasicCegarLoop]: trace histogram [28, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:49,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:49,254 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:49,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:49,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1496885106, now seen corresponding path program 9 times [2019-11-23 20:36:49,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:49,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995921810] [2019-11-23 20:36:49,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 20:36:49,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995921810] [2019-11-23 20:36:49,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282572438] [2019-11-23 20:36:49,414 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 20:36:50,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:36:50,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:50,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:36:50,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 20:36:50,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:50,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:36:50,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441878662] [2019-11-23 20:36:50,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:36:50,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:36:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:36:50,041 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2019-11-23 20:36:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:50,132 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2019-11-23 20:36:50,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:36:50,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-11-23 20:36:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:50,134 INFO L225 Difference]: With dead ends: 105 [2019-11-23 20:36:50,134 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:36:50,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:36:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:36:50,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 49. [2019-11-23 20:36:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:36:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-11-23 20:36:50,141 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2019-11-23 20:36:50,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:50,141 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-11-23 20:36:50,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:36:50,142 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-11-23 20:36:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:36:50,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:50,143 INFO L410 BasicCegarLoop]: trace histogram [28, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:50,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:50,344 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:50,344 INFO L82 PathProgramCache]: Analyzing trace with hash -789755816, now seen corresponding path program 10 times [2019-11-23 20:36:50,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:50,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755509498] [2019-11-23 20:36:50,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-23 20:36:50,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755509498] [2019-11-23 20:36:50,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53992572] [2019-11-23 20:36:50,483 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 20:36:50,560 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:50,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:50,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:36:50,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:36:50,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:50,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 31] total 38 [2019-11-23 20:36:50,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631890391] [2019-11-23 20:36:50,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:36:50,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:50,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:36:50,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:36:50,786 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 38 states. [2019-11-23 20:36:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:50,990 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2019-11-23 20:36:50,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:36:50,990 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2019-11-23 20:36:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:50,991 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:36:50,991 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:36:50,993 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:36:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:36:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 57. [2019-11-23 20:36:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:36:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-23 20:36:51,005 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2019-11-23 20:36:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:51,006 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-23 20:36:51,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:36:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-23 20:36:51,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:36:51,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:51,008 INFO L410 BasicCegarLoop]: trace histogram [35, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:51,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:51,222 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:51,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:51,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1890783863, now seen corresponding path program 11 times [2019-11-23 20:36:51,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:51,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119535559] [2019-11-23 20:36:51,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-23 20:36:51,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119535559] [2019-11-23 20:36:51,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413873875] [2019-11-23 20:36:51,386 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 20:38:24,349 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 20:38:24,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:24,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:38:24,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-23 20:38:24,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:24,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 38] total 45 [2019-11-23 20:38:24,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523973807] [2019-11-23 20:38:24,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:38:24,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:38:24,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=989, Invalid=991, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:38:24,731 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 45 states. [2019-11-23 20:38:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:24,953 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2019-11-23 20:38:24,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:38:24,954 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 55 [2019-11-23 20:38:24,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:24,955 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:38:24,955 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:38:24,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=989, Invalid=991, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:38:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:38:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 65. [2019-11-23 20:38:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:38:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-11-23 20:38:24,964 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 55 [2019-11-23 20:38:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:24,965 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-11-23 20:38:24,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:38:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-11-23 20:38:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:38:24,966 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:24,966 INFO L410 BasicCegarLoop]: trace histogram [42, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:25,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:25,167 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:25,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874872, now seen corresponding path program 12 times [2019-11-23 20:38:25,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:25,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346614818] [2019-11-23 20:38:25,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2019-11-23 20:38:25,354 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346614818] [2019-11-23 20:38:25,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388637250] [2019-11-23 20:38:25,355 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