/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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:13:17,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:13:17,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:13:17,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:13:17,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:13:17,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:13:17,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:13:17,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:13:17,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:13:17,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:13:17,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:13:17,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:13:17,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:13:17,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:13:17,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:13:17,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:13:17,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:13:17,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:13:17,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:13:17,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:13:17,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:13:17,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:13:17,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:13:17,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:13:17,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:13:17,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:13:17,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:13:17,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:13:17,082 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 22:13:17,096 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:13:17,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:13:17,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:13:17,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:13:17,098 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:13:17,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:13:17,098 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:13:17,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:13:17,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:13:17,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:13:17,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:13:17,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:13:17,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:13:17,099 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:13:17,099 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:13:17,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:13:17,100 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:13:17,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:13:17,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:13:17,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:13:17,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:13:17,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:13:17,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:13:17,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:13:17,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:13:17,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:13:17,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:13:17,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:13:17,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:13:17,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:13:17,416 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:13:17,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:13:17,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:13:17,436 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:13:17,436 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:13:17,437 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2019-11-23 22:13:17,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dfb9c3a/3b33fe42c2c04971a745359a2af898cd/FLAGf5cc8688f [2019-11-23 22:13:17,963 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:13:17,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2019-11-23 22:13:17,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dfb9c3a/3b33fe42c2c04971a745359a2af898cd/FLAGf5cc8688f [2019-11-23 22:13:18,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2dfb9c3a/3b33fe42c2c04971a745359a2af898cd [2019-11-23 22:13:18,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:13:18,361 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:13:18,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:18,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:13:18,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:13:18,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b67295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18, skipping insertion in model container [2019-11-23 22:13:18,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:13:18,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:13:18,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:18,593 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:13:18,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:18,754 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:13:18,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18 WrapperNode [2019-11-23 22:13:18,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:18,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:18,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:13:18,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:13:18,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:18,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:13:18,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:13:18,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:13:18,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (1/1) ... [2019-11-23 22:13:18,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:13:18,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:13:18,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:13:18,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:13:18,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (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 22:13:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:13:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:13:18,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:13:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:13:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-23 22:13:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:13:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:13:19,289 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:13:19,289 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 22:13:19,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:19 BoogieIcfgContainer [2019-11-23 22:13:19,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:13:19,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:13:19,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:13:19,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:13:19,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:13:18" (1/3) ... [2019-11-23 22:13:19,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e11dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:19, skipping insertion in model container [2019-11-23 22:13:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:18" (2/3) ... [2019-11-23 22:13:19,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e11dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:19, skipping insertion in model container [2019-11-23 22:13:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:19" (3/3) ... [2019-11-23 22:13:19,299 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2019-11-23 22:13:19,309 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:13:19,315 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:13:19,325 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:13:19,346 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:13:19,346 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:13:19,346 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:13:19,346 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:13:19,347 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:13:19,347 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:13:19,347 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:13:19,347 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:13:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-23 22:13:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:13:19,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:19,366 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:19,366 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:19,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:19,372 INFO L82 PathProgramCache]: Analyzing trace with hash 678614248, now seen corresponding path program 1 times [2019-11-23 22:13:19,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:19,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454463340] [2019-11-23 22:13:19,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:19,558 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 22:13:19,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454463340] [2019-11-23 22:13:19,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:19,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:13:19,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623822765] [2019-11-23 22:13:19,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:13:19,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:13:19,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:13:19,585 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-23 22:13:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:19,609 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2019-11-23 22:13:19,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:13:19,611 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 22:13:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:19,624 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:13:19,625 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:13:19,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:13:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:13:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 22:13:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:13:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-23 22:13:19,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2019-11-23 22:13:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:19,674 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-23 22:13:19,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:13:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-23 22:13:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:13:19,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:19,676 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:19,676 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash 137869947, now seen corresponding path program 1 times [2019-11-23 22:13:19,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:19,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155569578] [2019-11-23 22:13:19,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:19,821 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 22:13:19,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155569578] [2019-11-23 22:13:19,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:19,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:13:19,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025589019] [2019-11-23 22:13:19,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:13:19,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:19,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:13:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:13:19,828 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 3 states. [2019-11-23 22:13:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:19,919 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-11-23 22:13:19,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:13:19,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 22:13:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:19,921 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:13:19,922 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:13:19,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 22:13:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:13:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-23 22:13:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:13:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-23 22:13:19,935 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2019-11-23 22:13:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:19,936 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-23 22:13:19,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:13:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2019-11-23 22:13:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:13:19,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:19,938 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:19,938 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:19,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1682093747, now seen corresponding path program 1 times [2019-11-23 22:13:19,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:19,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062969922] [2019-11-23 22:13:19,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:20,076 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 22:13:20,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062969922] [2019-11-23 22:13:20,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:20,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:13:20,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000806152] [2019-11-23 22:13:20,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:20,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:20,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:20,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:20,081 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 4 states. [2019-11-23 22:13:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:20,167 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2019-11-23 22:13:20,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:20,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 22:13:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:20,168 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:13:20,168 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:13:20,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:13:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2019-11-23 22:13:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:13:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-23 22:13:20,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2019-11-23 22:13:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:20,176 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-23 22:13:20,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:20,176 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-23 22:13:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:13:20,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:20,177 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 22:13:20,177 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:20,178 INFO L82 PathProgramCache]: Analyzing trace with hash 701151449, now seen corresponding path program 1 times [2019-11-23 22:13:20,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:20,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100091587] [2019-11-23 22:13:20,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:20,301 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 22:13:20,303 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100091587] [2019-11-23 22:13:20,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216277026] [2019-11-23 22:13:20,304 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 22:13:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:20,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:13:20,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:20,487 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 22:13:20,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:20,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 22:13:20,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849607266] [2019-11-23 22:13:20,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:13:20,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:20,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:13:20,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:13:20,489 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 6 states. [2019-11-23 22:13:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:20,574 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2019-11-23 22:13:20,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:20,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 22:13:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:20,577 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:13:20,577 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:13:20,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:13:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:13:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-23 22:13:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:13:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2019-11-23 22:13:20,582 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2019-11-23 22:13:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:20,583 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2019-11-23 22:13:20,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:13:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2019-11-23 22:13:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:13:20,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:20,584 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:20,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:20,788 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:20,788 INFO L82 PathProgramCache]: Analyzing trace with hash 184920849, now seen corresponding path program 2 times [2019-11-23 22:13:20,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:20,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980669083] [2019-11-23 22:13:20,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:13:20,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980669083] [2019-11-23 22:13:20,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433063002] [2019-11-23 22:13:20,873 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 22:13:20,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 22:13:20,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:20,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:13:20,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:13:20,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:20,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-11-23 22:13:20,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672218745] [2019-11-23 22:13:20,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:20,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:13:20,966 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 4 states. [2019-11-23 22:13:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:21,052 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2019-11-23 22:13:21,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:21,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-23 22:13:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:21,054 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:13:21,054 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:13:21,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:13:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:13:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-11-23 22:13:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:13:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 22:13:21,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2019-11-23 22:13:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:21,061 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 22:13:21,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 22:13:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:13:21,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:21,062 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:21,267 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:21,267 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:21,268 INFO L82 PathProgramCache]: Analyzing trace with hash 623514617, now seen corresponding path program 1 times [2019-11-23 22:13:21,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:21,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770965972] [2019-11-23 22:13:21,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:13:21,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770965972] [2019-11-23 22:13:21,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346967984] [2019-11-23 22:13:21,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:13:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:21,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:13:21,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:13:21,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:21,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2019-11-23 22:13:21,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220853782] [2019-11-23 22:13:21,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:21,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:21,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:21,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:13:21,451 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 4 states. [2019-11-23 22:13:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:21,511 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2019-11-23 22:13:21,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:21,511 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 22:13:21,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:21,512 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:13:21,512 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 22:13:21,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:13:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 22:13:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-11-23 22:13:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:13:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-23 22:13:21,525 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2019-11-23 22:13:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:21,526 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-23 22:13:21,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-23 22:13:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:13:21,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:21,527 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:21,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:21,730 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:21,731 INFO L82 PathProgramCache]: Analyzing trace with hash -964833285, now seen corresponding path program 1 times [2019-11-23 22:13:21,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:21,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993446388] [2019-11-23 22:13:21,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:13:21,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993446388] [2019-11-23 22:13:21,802 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783037396] [2019-11-23 22:13:21,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:13:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:21,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:13:21,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:13:21,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:21,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-23 22:13:21,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588543874] [2019-11-23 22:13:21,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:13:21,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:21,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:13:21,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:13:21,948 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 8 states. [2019-11-23 22:13:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:22,104 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2019-11-23 22:13:22,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:13:22,107 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 22:13:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:22,108 INFO L225 Difference]: With dead ends: 94 [2019-11-23 22:13:22,109 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:13:22,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:13:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:13:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 41. [2019-11-23 22:13:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:13:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2019-11-23 22:13:22,124 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 23 [2019-11-23 22:13:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:22,124 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2019-11-23 22:13:22,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:13:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2019-11-23 22:13:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:13:22,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:22,127 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:22,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:22,331 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:22,331 INFO L82 PathProgramCache]: Analyzing trace with hash 35285809, now seen corresponding path program 2 times [2019-11-23 22:13:22,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:22,335 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706660228] [2019-11-23 22:13:22,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 22:13:22,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706660228] [2019-11-23 22:13:22,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502450270] [2019-11-23 22:13:22,473 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 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 22:13:22,554 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:22,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:22,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:13:22,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 22:13:22,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:22,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 22:13:22,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110887355] [2019-11-23 22:13:22,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:13:22,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:13:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:13:22,622 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 11 states. [2019-11-23 22:13:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:22,778 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2019-11-23 22:13:22,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:13:22,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-11-23 22:13:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:22,781 INFO L225 Difference]: With dead ends: 122 [2019-11-23 22:13:22,781 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 22:13:22,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:13:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 22:13:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2019-11-23 22:13:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:13:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2019-11-23 22:13:22,793 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 32 [2019-11-23 22:13:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:22,794 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2019-11-23 22:13:22,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:13:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2019-11-23 22:13:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:13:22,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:22,797 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:23,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:23,002 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:23,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:23,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1907582771, now seen corresponding path program 3 times [2019-11-23 22:13:23,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:23,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150981504] [2019-11-23 22:13:23,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 22:13:23,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150981504] [2019-11-23 22:13:23,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964162122] [2019-11-23 22:13:23,148 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 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 22:13:23,219 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:13:23,219 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:23,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:13:23,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-23 22:13:23,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:23,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 22:13:23,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209182113] [2019-11-23 22:13:23,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:13:23,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:23,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:13:23,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:13:23,277 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 11 states. [2019-11-23 22:13:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:23,551 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2019-11-23 22:13:23,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:13:23,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-11-23 22:13:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:23,555 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:13:23,556 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 22:13:23,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:13:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 22:13:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2019-11-23 22:13:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 22:13:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2019-11-23 22:13:23,576 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 38 [2019-11-23 22:13:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:23,576 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2019-11-23 22:13:23,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:13:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2019-11-23 22:13:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:13:23,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:23,581 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:23,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:23,787 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash 625894193, now seen corresponding path program 4 times [2019-11-23 22:13:23,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:23,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480289909] [2019-11-23 22:13:23,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 22:13:23,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480289909] [2019-11-23 22:13:23,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:23,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:13:23,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183489586] [2019-11-23 22:13:23,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:23,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:23,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:23,871 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand 4 states. [2019-11-23 22:13:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:23,899 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2019-11-23 22:13:23,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:23,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2019-11-23 22:13:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:23,901 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:13:23,902 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 22:13:23,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 22:13:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2019-11-23 22:13:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 22:13:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2019-11-23 22:13:23,912 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 56 [2019-11-23 22:13:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:23,913 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2019-11-23 22:13:23,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2019-11-23 22:13:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:13:23,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:23,914 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:23,914 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:23,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:23,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1418373588, now seen corresponding path program 1 times [2019-11-23 22:13:23,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:23,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603707453] [2019-11-23 22:13:23,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 22:13:24,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603707453] [2019-11-23 22:13:24,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786061613] [2019-11-23 22:13:24,026 INFO L94 rtionOrderModulation]: Keeping assertion order 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 22:13:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:24,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:13:24,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:24,212 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-23 22:13:24,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:24,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-23 22:13:24,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574406640] [2019-11-23 22:13:24,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:13:24,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:13:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:13:24,216 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 8 states. [2019-11-23 22:13:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:24,270 INFO L93 Difference]: Finished difference Result 149 states and 188 transitions. [2019-11-23 22:13:24,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:13:24,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2019-11-23 22:13:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:24,272 INFO L225 Difference]: With dead ends: 149 [2019-11-23 22:13:24,272 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 22:13:24,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:13:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 22:13:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2019-11-23 22:13:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 22:13:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2019-11-23 22:13:24,282 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 71 [2019-11-23 22:13:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:24,282 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2019-11-23 22:13:24,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:13:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2019-11-23 22:13:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 22:13:24,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:24,284 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:24,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:24,487 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1309468625, now seen corresponding path program 2 times [2019-11-23 22:13:24,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:24,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767464712] [2019-11-23 22:13:24,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 30 proven. 83 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 22:13:24,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767464712] [2019-11-23 22:13:24,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721902676] [2019-11-23 22:13:24,735 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 22:13:24,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:24,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:24,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:13:24,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 73 proven. 5 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-11-23 22:13:24,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:24,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2019-11-23 22:13:24,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735206843] [2019-11-23 22:13:24,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:13:24,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:13:24,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:13:24,960 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 15 states. [2019-11-23 22:13:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:25,083 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2019-11-23 22:13:25,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:13:25,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2019-11-23 22:13:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:25,085 INFO L225 Difference]: With dead ends: 176 [2019-11-23 22:13:25,085 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 22:13:25,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:13:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 22:13:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2019-11-23 22:13:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 22:13:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2019-11-23 22:13:25,096 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 86 [2019-11-23 22:13:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:25,097 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2019-11-23 22:13:25,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:13:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2019-11-23 22:13:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 22:13:25,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:25,098 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:25,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:25,310 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash 227557428, now seen corresponding path program 3 times [2019-11-23 22:13:25,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:25,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123400871] [2019-11-23 22:13:25,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 30 proven. 158 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 22:13:25,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123400871] [2019-11-23 22:13:25,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364082591] [2019-11-23 22:13:25,600 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 22:13:25,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:13:25,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:25,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:13:25,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-11-23 22:13:25,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:25,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2019-11-23 22:13:25,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283965532] [2019-11-23 22:13:25,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:13:25,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:25,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:13:25,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:13:25,980 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand 19 states. [2019-11-23 22:13:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:26,815 INFO L93 Difference]: Finished difference Result 284 states and 358 transitions. [2019-11-23 22:13:26,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 22:13:26,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 101 [2019-11-23 22:13:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:26,817 INFO L225 Difference]: With dead ends: 284 [2019-11-23 22:13:26,817 INFO L226 Difference]: Without dead ends: 210 [2019-11-23 22:13:26,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=565, Invalid=1691, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 22:13:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-23 22:13:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 122. [2019-11-23 22:13:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 22:13:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2019-11-23 22:13:26,840 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 101 [2019-11-23 22:13:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:26,840 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2019-11-23 22:13:26,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:13:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2019-11-23 22:13:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 22:13:26,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:26,845 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:27,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:27,051 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:27,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2123288935, now seen corresponding path program 4 times [2019-11-23 22:13:27,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:27,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938257368] [2019-11-23 22:13:27,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 43 proven. 263 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-11-23 22:13:27,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938257368] [2019-11-23 22:13:27,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363330728] [2019-11-23 22:13:27,388 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 22:13:27,505 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:27,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:27,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 22:13:27,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 53 proven. 250 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2019-11-23 22:13:27,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:27,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2019-11-23 22:13:27,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127326851] [2019-11-23 22:13:27,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:13:27,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:27,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:13:27,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:13:27,632 INFO L87 Difference]: Start difference. First operand 122 states and 151 transitions. Second operand 20 states. [2019-11-23 22:13:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:27,935 INFO L93 Difference]: Finished difference Result 236 states and 302 transitions. [2019-11-23 22:13:27,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:13:27,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2019-11-23 22:13:27,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:27,937 INFO L225 Difference]: With dead ends: 236 [2019-11-23 22:13:27,937 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 22:13:27,938 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:13:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 22:13:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2019-11-23 22:13:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-23 22:13:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2019-11-23 22:13:27,948 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 119 [2019-11-23 22:13:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:27,948 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2019-11-23 22:13:27,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:13:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2019-11-23 22:13:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-23 22:13:27,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:27,949 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 25, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:28,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:28,154 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:28,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1712112234, now seen corresponding path program 5 times [2019-11-23 22:13:28,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:28,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386380858] [2019-11-23 22:13:28,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 353 proven. 35 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked. [2019-11-23 22:13:28,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386380858] [2019-11-23 22:13:28,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374674883] [2019-11-23 22:13:28,433 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