java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:27,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:27,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:27,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:27,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:27,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:27,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:27,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:27,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:27,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:27,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:27,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:27,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:27,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:27,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:27,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:27,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:27,057 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:27,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:27,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:27,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:27,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:27,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:27,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:27,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:42:27,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:42:27,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:42:27,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:42:27,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:42:27,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:42:27,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:27,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:27,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:27,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:27,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:27,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:27,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:27,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:27,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:27,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:27,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:27,080 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 [2019-10-14 21:42:27,094 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:27,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:27,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:27,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:27,095 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:27,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:27,096 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:27,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:27,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:27,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:27,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:27,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:27,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:27,097 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:27,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:27,097 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:27,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:27,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:27,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:27,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:27,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:27,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:27,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:27,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:27,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:27,099 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:27,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:27,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:27,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:27,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:27,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:27,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:27,409 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:27,409 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:27,410 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-10-14 21:42:27,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e9f2248b/c9ac0779c6b64104ba5ab24e1dad28cf/FLAGef94ae143 [2019-10-14 21:42:27,925 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:27,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2019-10-14 21:42:27,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e9f2248b/c9ac0779c6b64104ba5ab24e1dad28cf/FLAGef94ae143 [2019-10-14 21:42:28,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e9f2248b/c9ac0779c6b64104ba5ab24e1dad28cf [2019-10-14 21:42:28,280 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:28,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:28,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:28,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:28,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:28,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e884bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28, skipping insertion in model container [2019-10-14 21:42:28,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,297 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:28,315 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:28,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:28,508 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:28,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:28,551 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:28,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28 WrapperNode [2019-10-14 21:42:28,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:28,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:28,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:28,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:28,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:28,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:28,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:28,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:28,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (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 [2019-10-14 21:42:28,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:28,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:28,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:28,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:28,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:28,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:29,047 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:29,047 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:42:29,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:29 BoogieIcfgContainer [2019-10-14 21:42:29,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:29,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:29,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:29,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:29,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:28" (1/3) ... [2019-10-14 21:42:29,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70faf347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:29, skipping insertion in model container [2019-10-14 21:42:29,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (2/3) ... [2019-10-14 21:42:29,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70faf347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:29, skipping insertion in model container [2019-10-14 21:42:29,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:29" (3/3) ... [2019-10-14 21:42:29,057 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2019-10-14 21:42:29,064 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:29,070 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:29,081 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:29,108 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:29,108 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:29,108 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:29,108 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:29,109 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:29,109 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:29,109 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:29,109 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-14 21:42:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:42:29,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:29,136 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:29,138 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:29,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1606204250, now seen corresponding path program 1 times [2019-10-14 21:42:29,151 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:29,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207408052] [2019-10-14 21:42:29,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:29,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207408052] [2019-10-14 21:42:29,315 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:29,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:29,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263023062] [2019-10-14 21:42:29,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:29,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:29,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:29,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:29,339 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2019-10-14 21:42:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:29,491 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2019-10-14 21:42:29,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:29,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 21:42:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:29,506 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:42:29,506 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:42:29,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:42:29,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 21:42:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:42:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-14 21:42:29,578 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-10-14 21:42:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:29,579 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-14 21:42:29,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-14 21:42:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:42:29,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:29,585 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:29,585 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:29,587 INFO L82 PathProgramCache]: Analyzing trace with hash -729587696, now seen corresponding path program 1 times [2019-10-14 21:42:29,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:29,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056112225] [2019-10-14 21:42:29,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:29,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056112225] [2019-10-14 21:42:29,700 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:29,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:29,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829502310] [2019-10-14 21:42:29,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:29,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:29,709 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-10-14 21:42:29,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:29,841 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2019-10-14 21:42:29,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:29,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:42:29,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:29,843 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:42:29,843 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:42:29,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:42:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 21:42:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:42:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2019-10-14 21:42:29,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 17 [2019-10-14 21:42:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:29,861 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2019-10-14 21:42:29,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2019-10-14 21:42:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:42:29,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:29,863 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:29,863 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:29,866 INFO L82 PathProgramCache]: Analyzing trace with hash 617787630, now seen corresponding path program 1 times [2019-10-14 21:42:29,866 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:29,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93827025] [2019-10-14 21:42:29,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:29,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:29,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93827025] [2019-10-14 21:42:29,962 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:29,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:29,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761269997] [2019-10-14 21:42:29,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:29,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:29,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:29,964 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 4 states. [2019-10-14 21:42:30,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:30,070 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2019-10-14 21:42:30,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:30,070 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:42:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:30,072 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:42:30,072 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:42:30,073 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:42:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-10-14 21:42:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:42:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2019-10-14 21:42:30,080 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2019-10-14 21:42:30,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:30,081 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2019-10-14 21:42:30,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2019-10-14 21:42:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:42:30,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:30,083 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:30,083 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:30,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1226217789, now seen corresponding path program 1 times [2019-10-14 21:42:30,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:30,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002805408] [2019-10-14 21:42:30,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:30,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:30,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:30,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002805408] [2019-10-14 21:42:30,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026980136] [2019-10-14 21:42:30,191 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 [2019-10-14 21:42:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:30,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:30,317 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:30,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:42:30,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467002162] [2019-10-14 21:42:30,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:42:30,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:30,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:42:30,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:30,319 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 7 states. [2019-10-14 21:42:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:30,449 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2019-10-14 21:42:30,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:42:30,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-10-14 21:42:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:30,451 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:42:30,451 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:42:30,452 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:42:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-10-14 21:42:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:42:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2019-10-14 21:42:30,460 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 22 [2019-10-14 21:42:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:30,460 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2019-10-14 21:42:30,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:42:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2019-10-14 21:42:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:42:30,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:30,462 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:30,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:30,674 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:30,674 INFO L82 PathProgramCache]: Analyzing trace with hash 874149032, now seen corresponding path program 2 times [2019-10-14 21:42:30,674 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:30,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383676911] [2019-10-14 21:42:30,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:30,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:30,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:42:30,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383676911] [2019-10-14 21:42:30,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424669280] [2019-10-14 21:42:30,809 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 [2019-10-14 21:42:30,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:30,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:30,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:30,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:30,879 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:30,880 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2019-10-14 21:42:30,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909512440] [2019-10-14 21:42:30,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:30,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:30,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:30,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:30,882 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 8 states. [2019-10-14 21:42:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:31,044 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2019-10-14 21:42:31,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:31,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-10-14 21:42:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:31,048 INFO L225 Difference]: With dead ends: 83 [2019-10-14 21:42:31,048 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:42:31,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:42:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-10-14 21:42:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:42:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2019-10-14 21:42:31,060 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2019-10-14 21:42:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:31,060 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2019-10-14 21:42:31,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2019-10-14 21:42:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:42:31,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:31,063 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:31,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:31,266 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:31,267 INFO L82 PathProgramCache]: Analyzing trace with hash -31110619, now seen corresponding path program 3 times [2019-10-14 21:42:31,267 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:31,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500291770] [2019-10-14 21:42:31,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:31,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:31,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:31,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500291770] [2019-10-14 21:42:31,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541335976] [2019-10-14 21:42:31,354 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:31,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:42:31,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:31,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:31,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:31,417 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:31,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2019-10-14 21:42:31,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942992260] [2019-10-14 21:42:31,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:42:31,418 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:31,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:42:31,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:31,419 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 7 states. [2019-10-14 21:42:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:31,561 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2019-10-14 21:42:31,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:42:31,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-10-14 21:42:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:31,563 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:42:31,564 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:42:31,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:42:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-10-14 21:42:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:42:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2019-10-14 21:42:31,573 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 36 [2019-10-14 21:42:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:31,574 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2019-10-14 21:42:31,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:42:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2019-10-14 21:42:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:42:31,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:31,575 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:31,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:31,780 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1546281126, now seen corresponding path program 4 times [2019-10-14 21:42:31,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:31,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61614746] [2019-10-14 21:42:31,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:31,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:31,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:31,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61614746] [2019-10-14 21:42:31,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431697491] [2019-10-14 21:42:31,913 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:31,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:31,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:31,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:31,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:42:32,000 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:32,000 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-10-14 21:42:32,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276141662] [2019-10-14 21:42:32,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:42:32,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:32,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:42:32,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:32,002 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 10 states. [2019-10-14 21:42:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:32,148 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2019-10-14 21:42:32,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:42:32,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-10-14 21:42:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:32,150 INFO L225 Difference]: With dead ends: 103 [2019-10-14 21:42:32,150 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:42:32,151 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:42:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-10-14 21:42:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:42:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2019-10-14 21:42:32,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 39 [2019-10-14 21:42:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:32,159 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2019-10-14 21:42:32,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:42:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2019-10-14 21:42:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:42:32,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:32,161 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:32,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:32,367 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:32,367 INFO L82 PathProgramCache]: Analyzing trace with hash -2027681847, now seen corresponding path program 5 times [2019-10-14 21:42:32,368 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:32,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666827432] [2019-10-14 21:42:32,368 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:32,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:32,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 21:42:32,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666827432] [2019-10-14 21:42:32,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220604750] [2019-10-14 21:42:32,481 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:32,548 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-14 21:42:32,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:32,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:32,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:42:32,578 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:32,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-10-14 21:42:32,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559612291] [2019-10-14 21:42:32,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:42:32,579 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:42:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:32,580 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 11 states. [2019-10-14 21:42:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:32,726 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2019-10-14 21:42:32,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:42:32,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-10-14 21:42:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:32,728 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:42:32,728 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:42:32,729 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:42:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2019-10-14 21:42:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:42:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2019-10-14 21:42:32,736 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 46 [2019-10-14 21:42:32,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:32,737 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2019-10-14 21:42:32,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:42:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2019-10-14 21:42:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:42:32,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:32,738 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:32,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:32,945 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2134546080, now seen corresponding path program 6 times [2019-10-14 21:42:32,946 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:32,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533041403] [2019-10-14 21:42:32,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:32,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:32,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:42:33,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533041403] [2019-10-14 21:42:33,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784853952] [2019-10-14 21:42:33,046 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:33,130 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:42:33,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:33,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:33,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:42:33,149 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:33,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2019-10-14 21:42:33,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068458178] [2019-10-14 21:42:33,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:42:33,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:33,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:42:33,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:33,151 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 10 states. [2019-10-14 21:42:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:33,310 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2019-10-14 21:42:33,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:42:33,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2019-10-14 21:42:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:33,312 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:42:33,312 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:42:33,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:42:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-10-14 21:42:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:42:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2019-10-14 21:42:33,320 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 51 [2019-10-14 21:42:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:33,320 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2019-10-14 21:42:33,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:42:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2019-10-14 21:42:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:42:33,322 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:33,322 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:33,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:33,526 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1673311115, now seen corresponding path program 7 times [2019-10-14 21:42:33,527 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:33,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425682556] [2019-10-14 21:42:33,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:42:33,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425682556] [2019-10-14 21:42:33,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66756978] [2019-10-14 21:42:33,641 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:33,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:42:33,731 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:33,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-10-14 21:42:33,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740198614] [2019-10-14 21:42:33,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:33,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:33,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:33,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:33,733 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 13 states. [2019-10-14 21:42:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:33,909 INFO L93 Difference]: Finished difference Result 133 states and 179 transitions. [2019-10-14 21:42:33,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:33,909 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2019-10-14 21:42:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:33,910 INFO L225 Difference]: With dead ends: 133 [2019-10-14 21:42:33,910 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 21:42:33,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 21:42:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-10-14 21:42:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 21:42:33,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2019-10-14 21:42:33,919 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 54 [2019-10-14 21:42:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:33,919 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2019-10-14 21:42:33,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2019-10-14 21:42:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:42:33,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:33,921 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:34,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:34,125 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:34,125 INFO L82 PathProgramCache]: Analyzing trace with hash -5592132, now seen corresponding path program 8 times [2019-10-14 21:42:34,126 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:34,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297988126] [2019-10-14 21:42:34,126 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,126 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 21:42:34,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297988126] [2019-10-14 21:42:34,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059555767] [2019-10-14 21:42:34,240 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 [2019-10-14 21:42:34,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:34,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:34,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:34,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 21:42:34,331 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:34,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2019-10-14 21:42:34,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566750728] [2019-10-14 21:42:34,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:34,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:34,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:34,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:34,333 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand 14 states. [2019-10-14 21:42:34,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:34,576 INFO L93 Difference]: Finished difference Result 143 states and 192 transitions. [2019-10-14 21:42:34,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:42:34,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2019-10-14 21:42:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:34,578 INFO L225 Difference]: With dead ends: 143 [2019-10-14 21:42:34,578 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:42:34,578 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:42:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2019-10-14 21:42:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:42:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2019-10-14 21:42:34,586 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 61 [2019-10-14 21:42:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:34,586 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2019-10-14 21:42:34,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2019-10-14 21:42:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:42:34,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:34,587 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:34,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:34,800 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1895895825, now seen corresponding path program 9 times [2019-10-14 21:42:34,801 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:34,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198770812] [2019-10-14 21:42:34,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:42:34,925 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198770812] [2019-10-14 21:42:34,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18197449] [2019-10-14 21:42:34,926 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 [2019-10-14 21:42:35,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:42:35,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:35,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:42:35,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:42:35,036 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:35,036 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-10-14 21:42:35,036 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424790455] [2019-10-14 21:42:35,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:35,037 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:35,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:35,038 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 13 states. [2019-10-14 21:42:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:35,233 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2019-10-14 21:42:35,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:35,234 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2019-10-14 21:42:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:35,236 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:42:35,237 INFO L226 Difference]: Without dead ends: 93 [2019-10-14 21:42:35,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-14 21:42:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2019-10-14 21:42:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:42:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2019-10-14 21:42:35,253 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 66 [2019-10-14 21:42:35,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:35,254 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2019-10-14 21:42:35,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:35,254 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2019-10-14 21:42:35,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:42:35,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:35,255 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:35,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:35,456 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1832591302, now seen corresponding path program 10 times [2019-10-14 21:42:35,456 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:35,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818569886] [2019-10-14 21:42:35,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:42:35,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818569886] [2019-10-14 21:42:35,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520496793] [2019-10-14 21:42:35,608 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 [2019-10-14 21:42:35,695 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:35,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:35,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:35,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-14 21:42:35,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:35,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-10-14 21:42:35,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942240210] [2019-10-14 21:42:35,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:42:35,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:42:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:35,744 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand 16 states. [2019-10-14 21:42:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:35,987 INFO L93 Difference]: Finished difference Result 163 states and 221 transitions. [2019-10-14 21:42:35,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:42:35,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-10-14 21:42:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:35,991 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:42:35,991 INFO L226 Difference]: Without dead ends: 102 [2019-10-14 21:42:35,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-10-14 21:42:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2019-10-14 21:42:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-14 21:42:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2019-10-14 21:42:36,006 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 69 [2019-10-14 21:42:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:36,006 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2019-10-14 21:42:36,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:42:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2019-10-14 21:42:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:42:36,007 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:36,008 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:36,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:36,215 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:36,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1016848565, now seen corresponding path program 11 times [2019-10-14 21:42:36,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:36,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621590949] [2019-10-14 21:42:36,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:36,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:36,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 21:42:36,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621590949] [2019-10-14 21:42:36,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484628284] [2019-10-14 21:42:36,391 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:36,634 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-10-14 21:42:36,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:36,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:36,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 21:42:36,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:36,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-10-14 21:42:36,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321426871] [2019-10-14 21:42:36,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:42:36,672 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:36,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:42:36,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:36,673 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand 15 states. [2019-10-14 21:42:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:36,877 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2019-10-14 21:42:36,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:42:36,877 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2019-10-14 21:42:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:36,878 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:42:36,878 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 21:42:36,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:36,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 21:42:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2019-10-14 21:42:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 21:42:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2019-10-14 21:42:36,889 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 76 [2019-10-14 21:42:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:36,890 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2019-10-14 21:42:36,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:42:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2019-10-14 21:42:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:42:36,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:36,891 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:37,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:37,093 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:37,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1181057046, now seen corresponding path program 12 times [2019-10-14 21:42:37,094 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:37,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129767037] [2019-10-14 21:42:37,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:37,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:37,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-14 21:42:37,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129767037] [2019-10-14 21:42:37,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749740986] [2019-10-14 21:42:37,259 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:37,535 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-10-14 21:42:37,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:37,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:37,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-14 21:42:37,596 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:37,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-10-14 21:42:37,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900357342] [2019-10-14 21:42:37,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:37,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:37,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:37,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:37,598 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand 18 states. [2019-10-14 21:42:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:37,861 INFO L93 Difference]: Finished difference Result 183 states and 249 transitions. [2019-10-14 21:42:37,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:37,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-10-14 21:42:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:37,863 INFO L225 Difference]: With dead ends: 183 [2019-10-14 21:42:37,863 INFO L226 Difference]: Without dead ends: 114 [2019-10-14 21:42:37,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-14 21:42:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2019-10-14 21:42:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-14 21:42:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2019-10-14 21:42:37,870 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 79 [2019-10-14 21:42:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:37,870 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2019-10-14 21:42:37,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2019-10-14 21:42:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:42:37,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:37,871 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:38,075 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2102517337, now seen corresponding path program 13 times [2019-10-14 21:42:38,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652577263] [2019-10-14 21:42:38,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:42:38,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652577263] [2019-10-14 21:42:38,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145836120] [2019-10-14 21:42:38,311 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:42:38,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-14 21:42:38,431 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:38,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 19 [2019-10-14 21:42:38,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511034775] [2019-10-14 21:42:38,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:38,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:38,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:38,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:38,435 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 19 states. [2019-10-14 21:42:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:38,712 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2019-10-14 21:42:38,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:42:38,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2019-10-14 21:42:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:38,713 INFO L225 Difference]: With dead ends: 193 [2019-10-14 21:42:38,714 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 21:42:38,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 21:42:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2019-10-14 21:42:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-14 21:42:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2019-10-14 21:42:38,720 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 86 [2019-10-14 21:42:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:38,721 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2019-10-14 21:42:38,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2019-10-14 21:42:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 21:42:38,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:38,722 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:38,923 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1364290864, now seen corresponding path program 14 times [2019-10-14 21:42:38,923 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,923 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014389327] [2019-10-14 21:42:38,923 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,924 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-14 21:42:39,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014389327] [2019-10-14 21:42:39,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551817072] [2019-10-14 21:42:39,192 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:39,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:39,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:39,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:42:39,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-14 21:42:39,293 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:39,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2019-10-14 21:42:39,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249500708] [2019-10-14 21:42:39,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:42:39,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:42:39,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:39,295 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand 20 states. [2019-10-14 21:42:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,564 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2019-10-14 21:42:39,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:42:39,564 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2019-10-14 21:42:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,565 INFO L225 Difference]: With dead ends: 203 [2019-10-14 21:42:39,565 INFO L226 Difference]: Without dead ends: 126 [2019-10-14 21:42:39,566 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:42:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-10-14 21:42:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2019-10-14 21:42:39,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-10-14 21:42:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2019-10-14 21:42:39,572 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 91 [2019-10-14 21:42:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,572 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2019-10-14 21:42:39,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:42:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2019-10-14 21:42:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 21:42:39,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,574 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:39,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:39,778 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,779 INFO L82 PathProgramCache]: Analyzing trace with hash 213994493, now seen corresponding path program 15 times [2019-10-14 21:42:39,779 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045491903] [2019-10-14 21:42:39,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 21:42:39,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045491903] [2019-10-14 21:42:39,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659988380] [2019-10-14 21:42:39,979 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-14 21:42:40,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:40,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 21:42:40,198 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:40,198 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2019-10-14 21:42:40,198 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452978613] [2019-10-14 21:42:40,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:40,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:40,199 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand 19 states. [2019-10-14 21:42:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,463 INFO L93 Difference]: Finished difference Result 146 states and 190 transitions. [2019-10-14 21:42:40,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:42:40,464 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-10-14 21:42:40,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,465 INFO L225 Difference]: With dead ends: 146 [2019-10-14 21:42:40,465 INFO L226 Difference]: Without dead ends: 129 [2019-10-14 21:42:40,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-14 21:42:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-10-14 21:42:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-14 21:42:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2019-10-14 21:42:40,472 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 96 [2019-10-14 21:42:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,472 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2019-10-14 21:42:40,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2019-10-14 21:42:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 21:42:40,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,474 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,679 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2028269518, now seen corresponding path program 16 times [2019-10-14 21:42:40,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312685599] [2019-10-14 21:42:40,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-14 21:42:40,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312685599] [2019-10-14 21:42:40,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50459185] [2019-10-14 21:42:40,890 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,967 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:40,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:40,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-14 21:42:41,013 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:41,013 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2019-10-14 21:42:41,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411318787] [2019-10-14 21:42:41,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:42:41,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:42:41,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:41,016 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand 22 states. [2019-10-14 21:42:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,313 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2019-10-14 21:42:41,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:42:41,313 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2019-10-14 21:42:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,315 INFO L225 Difference]: With dead ends: 223 [2019-10-14 21:42:41,315 INFO L226 Difference]: Without dead ends: 138 [2019-10-14 21:42:41,315 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-14 21:42:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-10-14 21:42:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-14 21:42:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2019-10-14 21:42:41,322 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 99 [2019-10-14 21:42:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,323 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2019-10-14 21:42:41,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:42:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2019-10-14 21:42:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:42:41,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,324 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,528 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1191733665, now seen corresponding path program 17 times [2019-10-14 21:42:41,529 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786574168] [2019-10-14 21:42:41,529 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-14 21:42:41,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786574168] [2019-10-14 21:42:41,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820645183] [2019-10-14 21:42:41,799 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,542 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-10-14 21:42:42,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:42,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-14 21:42:42,565 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:42,565 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2019-10-14 21:42:42,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141536202] [2019-10-14 21:42:42,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:42:42,566 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:42:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:42,567 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand 21 states. [2019-10-14 21:42:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,901 INFO L93 Difference]: Finished difference Result 158 states and 206 transitions. [2019-10-14 21:42:42,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:42,901 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 106 [2019-10-14 21:42:42,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,903 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:42:42,903 INFO L226 Difference]: Without dead ends: 141 [2019-10-14 21:42:42,905 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-14 21:42:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2019-10-14 21:42:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-10-14 21:42:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2019-10-14 21:42:42,910 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 106 [2019-10-14 21:42:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,910 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2019-10-14 21:42:42,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:42:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2019-10-14 21:42:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 21:42:42,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,912 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:43,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,117 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1387741098, now seen corresponding path program 18 times [2019-10-14 21:42:43,118 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213723867] [2019-10-14 21:42:43,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-14 21:42:43,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213723867] [2019-10-14 21:42:43,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034440465] [2019-10-14 21:42:43,404 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,242 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-10-14 21:42:44,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:44,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:42:44,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-14 21:42:44,264 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:44,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2019-10-14 21:42:44,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762769833] [2019-10-14 21:42:44,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:42:44,265 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:42:44,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:44,266 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand 22 states. [2019-10-14 21:42:44,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,585 INFO L93 Difference]: Finished difference Result 163 states and 213 transitions. [2019-10-14 21:42:44,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:42:44,585 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2019-10-14 21:42:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,586 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:42:44,587 INFO L226 Difference]: Without dead ends: 146 [2019-10-14 21:42:44,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-14 21:42:44,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2019-10-14 21:42:44,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-10-14 21:42:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2019-10-14 21:42:44,591 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 109 [2019-10-14 21:42:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,591 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2019-10-14 21:42:44,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:42:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2019-10-14 21:42:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 21:42:44,593 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,593 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,801 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash -510344959, now seen corresponding path program 19 times [2019-10-14 21:42:44,802 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859533607] [2019-10-14 21:42:44,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-14 21:42:45,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859533607] [2019-10-14 21:42:45,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739628409] [2019-10-14 21:42:45,067 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-10-14 21:42:45,184 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 25 [2019-10-14 21:42:45,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586503681] [2019-10-14 21:42:45,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:42:45,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:42:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:45,186 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand 25 states. [2019-10-14 21:42:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,568 INFO L93 Difference]: Finished difference Result 253 states and 348 transitions. [2019-10-14 21:42:45,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:42:45,570 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 112 [2019-10-14 21:42:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,572 INFO L225 Difference]: With dead ends: 253 [2019-10-14 21:42:45,572 INFO L226 Difference]: Without dead ends: 156 [2019-10-14 21:42:45,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-10-14 21:42:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2019-10-14 21:42:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-10-14 21:42:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2019-10-14 21:42:45,577 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 112 [2019-10-14 21:42:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,578 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2019-10-14 21:42:45,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:42:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2019-10-14 21:42:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:42:45,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,579 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,782 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 380987876, now seen corresponding path program 20 times [2019-10-14 21:42:45,783 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,783 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423086584] [2019-10-14 21:42:45,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,783 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-10-14 21:42:46,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423086584] [2019-10-14 21:42:46,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635221999] [2019-10-14 21:42:46,113 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:46,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:46,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-10-14 21:42:46,303 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 26 [2019-10-14 21:42:46,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807412] [2019-10-14 21:42:46,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:42:46,306 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:42:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:46,307 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand 26 states. [2019-10-14 21:42:46,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,660 INFO L93 Difference]: Finished difference Result 263 states and 360 transitions. [2019-10-14 21:42:46,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:42:46,661 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2019-10-14 21:42:46,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,663 INFO L225 Difference]: With dead ends: 263 [2019-10-14 21:42:46,663 INFO L226 Difference]: Without dead ends: 162 [2019-10-14 21:42:46,666 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:42:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-10-14 21:42:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2019-10-14 21:42:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-14 21:42:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2019-10-14 21:42:46,673 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 206 transitions. Word has length 121 [2019-10-14 21:42:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,674 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 206 transitions. [2019-10-14 21:42:46,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:42:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 206 transitions. [2019-10-14 21:42:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:42:46,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,675 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:46,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,879 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1860782871, now seen corresponding path program 21 times [2019-10-14 21:42:46,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:46,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107005038] [2019-10-14 21:42:46,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-14 21:42:47,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107005038] [2019-10-14 21:42:47,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326501633] [2019-10-14 21:42:47,211 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-14 21:42:48,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:48,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:42:48,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-14 21:42:48,093 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:48,093 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2019-10-14 21:42:48,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405545908] [2019-10-14 21:42:48,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:42:48,094 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:48,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:42:48,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:48,095 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. Second operand 25 states. [2019-10-14 21:42:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:48,422 INFO L93 Difference]: Finished difference Result 182 states and 238 transitions. [2019-10-14 21:42:48,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:42:48,422 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-14 21:42:48,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:48,424 INFO L225 Difference]: With dead ends: 182 [2019-10-14 21:42:48,424 INFO L226 Difference]: Without dead ends: 165 [2019-10-14 21:42:48,424 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-14 21:42:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2019-10-14 21:42:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-10-14 21:42:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 212 transitions. [2019-10-14 21:42:48,430 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 212 transitions. Word has length 126 [2019-10-14 21:42:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:48,430 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 212 transitions. [2019-10-14 21:42:48,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:42:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 212 transitions. [2019-10-14 21:42:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 21:42:48,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:48,431 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:48,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,632 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:48,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1210175330, now seen corresponding path program 22 times [2019-10-14 21:42:48,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:48,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933322668] [2019-10-14 21:42:48,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-14 21:42:49,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933322668] [2019-10-14 21:42:49,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531207002] [2019-10-14 21:42:49,069 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,169 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:49,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:49,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:42:49,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-10-14 21:42:49,202 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:49,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2019-10-14 21:42:49,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79183263] [2019-10-14 21:42:49,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:42:49,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:42:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:42:49,203 INFO L87 Difference]: Start difference. First operand 162 states and 212 transitions. Second operand 28 states. [2019-10-14 21:42:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,600 INFO L93 Difference]: Finished difference Result 283 states and 389 transitions. [2019-10-14 21:42:49,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:42:49,601 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 129 [2019-10-14 21:42:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,603 INFO L225 Difference]: With dead ends: 283 [2019-10-14 21:42:49,603 INFO L226 Difference]: Without dead ends: 174 [2019-10-14 21:42:49,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:42:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-10-14 21:42:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2019-10-14 21:42:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-10-14 21:42:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 222 transitions. [2019-10-14 21:42:49,612 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 222 transitions. Word has length 129 [2019-10-14 21:42:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,612 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 222 transitions. [2019-10-14 21:42:49,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:42:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 222 transitions. [2019-10-14 21:42:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 21:42:49,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,624 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:49,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,828 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:49,828 INFO L82 PathProgramCache]: Analyzing trace with hash 697983629, now seen corresponding path program 23 times [2019-10-14 21:42:49,829 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:49,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709321868] [2019-10-14 21:42:49,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-10-14 21:42:50,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709321868] [2019-10-14 21:42:50,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313829844] [2019-10-14 21:42:50,271 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,163 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-10-14 21:42:52,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:52,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:42:52,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-10-14 21:42:52,197 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:52,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2019-10-14 21:42:52,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45767576] [2019-10-14 21:42:52,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:42:52,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:52,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:42:52,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:52,199 INFO L87 Difference]: Start difference. First operand 170 states and 222 transitions. Second operand 27 states. [2019-10-14 21:42:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:52,691 INFO L93 Difference]: Finished difference Result 194 states and 254 transitions. [2019-10-14 21:42:52,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:42:52,692 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2019-10-14 21:42:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:52,694 INFO L225 Difference]: With dead ends: 194 [2019-10-14 21:42:52,694 INFO L226 Difference]: Without dead ends: 177 [2019-10-14 21:42:52,695 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-10-14 21:42:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2019-10-14 21:42:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-10-14 21:42:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 228 transitions. [2019-10-14 21:42:52,703 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 228 transitions. Word has length 136 [2019-10-14 21:42:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:52,704 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 228 transitions. [2019-10-14 21:42:52,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:42:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 228 transitions. [2019-10-14 21:42:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-14 21:42:52,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:52,706 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:52,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,916 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1951559874, now seen corresponding path program 24 times [2019-10-14 21:42:52,916 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:52,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130273167] [2019-10-14 21:42:52,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-10-14 21:42:53,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130273167] [2019-10-14 21:42:53,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670936810] [2019-10-14 21:42:53,484 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,097 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-10-14 21:42:55,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:55,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:42:55,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-10-14 21:42:55,134 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:55,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2019-10-14 21:42:55,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843236817] [2019-10-14 21:42:55,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:42:55,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:55,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:42:55,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:42:55,135 INFO L87 Difference]: Start difference. First operand 174 states and 228 transitions. Second operand 30 states. [2019-10-14 21:42:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:55,473 INFO L93 Difference]: Finished difference Result 303 states and 417 transitions. [2019-10-14 21:42:55,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:42:55,474 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-10-14 21:42:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:55,475 INFO L225 Difference]: With dead ends: 303 [2019-10-14 21:42:55,475 INFO L226 Difference]: Without dead ends: 186 [2019-10-14 21:42:55,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:42:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2019-10-14 21:42:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2019-10-14 21:42:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-10-14 21:42:55,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 238 transitions. [2019-10-14 21:42:55,483 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 238 transitions. Word has length 139 [2019-10-14 21:42:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:55,483 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 238 transitions. [2019-10-14 21:42:55,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:42:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 238 transitions. [2019-10-14 21:42:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 21:42:55,484 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:55,484 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:55,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,690 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:55,691 INFO L82 PathProgramCache]: Analyzing trace with hash -965820367, now seen corresponding path program 25 times [2019-10-14 21:42:55,691 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:55,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603994808] [2019-10-14 21:42:55,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:55,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:55,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-10-14 21:42:56,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603994808] [2019-10-14 21:42:56,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343298030] [2019-10-14 21:42:56,077 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:42:56,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-10-14 21:42:56,234 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:56,234 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 31 [2019-10-14 21:42:56,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409223520] [2019-10-14 21:42:56,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:42:56,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:56,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:42:56,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:42:56,235 INFO L87 Difference]: Start difference. First operand 182 states and 238 transitions. Second operand 31 states. [2019-10-14 21:42:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:56,587 INFO L93 Difference]: Finished difference Result 313 states and 430 transitions. [2019-10-14 21:42:56,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:42:56,588 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2019-10-14 21:42:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:56,589 INFO L225 Difference]: With dead ends: 313 [2019-10-14 21:42:56,589 INFO L226 Difference]: Without dead ends: 192 [2019-10-14 21:42:56,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:42:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-10-14 21:42:56,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2019-10-14 21:42:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-10-14 21:42:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 246 transitions. [2019-10-14 21:42:56,597 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 246 transitions. Word has length 146 [2019-10-14 21:42:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:56,597 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 246 transitions. [2019-10-14 21:42:56,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:42:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 246 transitions. [2019-10-14 21:42:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-14 21:42:56,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:56,599 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:56,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:56,803 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:56,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:56,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1865518856, now seen corresponding path program 26 times [2019-10-14 21:42:56,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:56,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710726579] [2019-10-14 21:42:56,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-10-14 21:42:57,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710726579] [2019-10-14 21:42:57,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88252184] [2019-10-14 21:42:57,375 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:57,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:57,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:57,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:42:57,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-10-14 21:42:57,561 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:57,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2019-10-14 21:42:57,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544857083] [2019-10-14 21:42:57,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:42:57,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:42:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:42:57,564 INFO L87 Difference]: Start difference. First operand 188 states and 246 transitions. Second operand 32 states. [2019-10-14 21:42:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:58,060 INFO L93 Difference]: Finished difference Result 323 states and 444 transitions. [2019-10-14 21:42:58,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:42:58,060 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2019-10-14 21:42:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:58,062 INFO L225 Difference]: With dead ends: 323 [2019-10-14 21:42:58,062 INFO L226 Difference]: Without dead ends: 198 [2019-10-14 21:42:58,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:42:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-10-14 21:42:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2019-10-14 21:42:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-10-14 21:42:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2019-10-14 21:42:58,075 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 151 [2019-10-14 21:42:58,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:58,076 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2019-10-14 21:42:58,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:42:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2019-10-14 21:42:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 21:42:58,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:58,078 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:58,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:58,283 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:58,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:58,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1815219669, now seen corresponding path program 27 times [2019-10-14 21:42:58,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:58,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331773498] [2019-10-14 21:42:58,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-14 21:42:58,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331773498] [2019-10-14 21:42:58,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663903533] [2019-10-14 21:42:58,834 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:01,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-10-14 21:43:01,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:01,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:43:01,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-14 21:43:01,822 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:01,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2019-10-14 21:43:01,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104994579] [2019-10-14 21:43:01,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:43:01,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:01,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:43:01,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:43:01,824 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand 31 states. [2019-10-14 21:43:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:02,211 INFO L93 Difference]: Finished difference Result 218 states and 286 transitions. [2019-10-14 21:43:02,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:43:02,212 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2019-10-14 21:43:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:02,214 INFO L225 Difference]: With dead ends: 218 [2019-10-14 21:43:02,215 INFO L226 Difference]: Without dead ends: 201 [2019-10-14 21:43:02,215 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:43:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-10-14 21:43:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2019-10-14 21:43:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-10-14 21:43:02,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2019-10-14 21:43:02,221 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 156 [2019-10-14 21:43:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:02,222 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2019-10-14 21:43:02,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:43:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2019-10-14 21:43:02,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-14 21:43:02,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:02,223 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:02,429 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:02,430 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:02,431 INFO L82 PathProgramCache]: Analyzing trace with hash -74268938, now seen corresponding path program 28 times [2019-10-14 21:43:02,431 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:02,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041744256] [2019-10-14 21:43:02,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:02,432 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:02,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-14 21:43:02,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041744256] [2019-10-14 21:43:02,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869148181] [2019-10-14 21:43:02,939 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:03,078 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:03,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:03,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:43:03,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2019-10-14 21:43:03,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:03,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2019-10-14 21:43:03,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448752223] [2019-10-14 21:43:03,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 21:43:03,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 21:43:03,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:43:03,135 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand 34 states. [2019-10-14 21:43:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:03,656 INFO L93 Difference]: Finished difference Result 343 states and 473 transitions. [2019-10-14 21:43:03,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:43:03,657 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 159 [2019-10-14 21:43:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:03,659 INFO L225 Difference]: With dead ends: 343 [2019-10-14 21:43:03,659 INFO L226 Difference]: Without dead ends: 210 [2019-10-14 21:43:03,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:43:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-10-14 21:43:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2019-10-14 21:43:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-10-14 21:43:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2019-10-14 21:43:03,667 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 159 [2019-10-14 21:43:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:03,667 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2019-10-14 21:43:03,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 21:43:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2019-10-14 21:43:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-14 21:43:03,668 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:03,668 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:03,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:03,873 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:03,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2046987129, now seen corresponding path program 29 times [2019-10-14 21:43:03,874 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:03,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513120540] [2019-10-14 21:43:03,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:03,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:03,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-10-14 21:43:04,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513120540] [2019-10-14 21:43:04,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72478873] [2019-10-14 21:43:04,367 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:06,623 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2019-10-14 21:43:06,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:06,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 21:43:06,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2019-10-14 21:43:06,676 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:06,676 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 35 [2019-10-14 21:43:06,676 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953055967] [2019-10-14 21:43:06,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:43:06,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:06,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:43:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:43:06,678 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand 35 states. [2019-10-14 21:43:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:07,189 INFO L93 Difference]: Finished difference Result 353 states and 486 transitions. [2019-10-14 21:43:07,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:43:07,189 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2019-10-14 21:43:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:07,191 INFO L225 Difference]: With dead ends: 353 [2019-10-14 21:43:07,191 INFO L226 Difference]: Without dead ends: 216 [2019-10-14 21:43:07,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:43:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-14 21:43:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2019-10-14 21:43:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-10-14 21:43:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 278 transitions. [2019-10-14 21:43:07,205 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 278 transitions. Word has length 166 [2019-10-14 21:43:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:07,206 INFO L462 AbstractCegarLoop]: Abstraction has 212 states and 278 transitions. [2019-10-14 21:43:07,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:43:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 278 transitions. [2019-10-14 21:43:07,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 21:43:07,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:07,208 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:07,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:07,416 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:07,417 INFO L82 PathProgramCache]: Analyzing trace with hash 710272432, now seen corresponding path program 30 times [2019-10-14 21:43:07,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:07,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067589750] [2019-10-14 21:43:07,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:07,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:07,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2359 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-10-14 21:43:08,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067589750] [2019-10-14 21:43:08,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840306981] [2019-10-14 21:43:08,173 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true